Simons Maison
TencelTm Lyocell Symphonie Duvet Cooling Casing
This is a duvet (Symphonie) with a cooling casing made of 300-thread-count TENCEL lyocell, a biodegradable fiber with moisture-wicking properties, and a washable, hypoallergenic recycled polyester fill. It is designed to provide cool, comfortable sleep and features piped trim, sewn-through box construction to keep fill in place, and is machine washable/dryable. Available in Twin, Double, Queen, and King sizes with dimensions ranging from 66x90 inches (168x229 cm) to 108x95 inches (274x241 cm) and weights from 38 to 65 oz.
- Material
- 300-thread-count TENCEL lyocell casing with recycled polyester fill
- Category
- Home & Garden > Linens & Bedding > Bedding > Quilts & Comforters
Color
Size
Specifications
Cooling duvet with TENCEL lyocell casing and recycled polyester fill, designed in Canada.
Moisture wicking, thermoregulating, hypoallergenic, odourless, lightweight, piped trim, sewn-through boxes, machine washable.
- Material
- 300-thread-count TENCEL lyocell casing with recycled polyester fill
- Secondary
- recycled-polyester
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Home & Garden > Linens & Bedding > Bedding > Quilts & Comforters
Additional Attributes
- Cooling
- Moisture-wicking
- Hypoallergenic
- Machine-washable
- Lightweight
- Piped trim
- Sewn-through boxes
- Thermoregulating
- Odourless
- Recycled polyester fill
- Biodegradable
- 300 thread count
Product Insights
The Tencel Lyocell duvet casing from Simons Maison combines a sustainably sourced, soft Tencel cover with a recycled polyester fill that is hypoallergenic and moisture-wicking, offering a plush, hotel-quality appearance at a competitive price. However, despite its cooling label, the duvet retains body heat, making it better suited for cold sleepers and winter use. Maintenance demands daily fluffing to redistribute shifting fill and prevent heat buildup, while the slippery casing and lack of corner loops necessitate aftermarket clips. Stitching may unravel after washing, and the double size overhangs standard beds, requiring a queen cover. The duvet's warmth and upkeep tradeoffs position it as a value-oriented option for those seeking a soft, sustainable duvet with a caveat against summer cooling.
Verified claims
- Cooling
- Buyers report the duvet traps heat and is too warm for summer cooling use.
- Maintenance
- The Tencel casing is slippery and requires daily fluffing to redistribute the fill.
- Competitive pricing
- At $49.95 CAD on sale, the duvet costs roughly one-tenth of a Simba Hybrid 3-in-1.
- Value
- At $49.95, the duvet combines a Tencel casing, recycled fill, moisture-wicking, and hypoallergenic benefits—features often priced 2-3x higher.
- Heat retention
- Despite its cooling label, the duvet retains body heat, suiting cold sleepers and winter use.
- Construction concerns
- Unraveling stitching and fill shift reported; daily fluffing and aftermarket clips may be needed.
- Hygiene
- The casing inhibits bacterial growth and the fill resists moisture, making the duvet hypoallergenic.
- Material quality
- The round, smooth Tencel fibres make the casing feel softer than 600 TC cotton, and the materials are sustainably sourced.
- Warmth
- The recycled polyester fill retains body heat, making the duvet feel warm despite the cooling casing.
- Plushness
- Duvet has a puffy, over-stuffed visual appearance with a plush medium loft comparable to down.
- Cover fit
- Double duvet's 84 width causes overhang; requires a queen-size cover.
- Corner loops
- No corner loops; duvet must be secured with clips or cover ties.
- Stitching durability
- Buyers report stitching unraveling after washing, affecting fill stability.
- Recycled fill
- 100% recycled polyester fill repurposes ~35 PET bottles per kg.
- Hypoallergenic
- Fill's <1% moisture absorption makes it hypoallergenic and resists dust mites and mold.
- Perceived luxury
- Buyers report a cloud-like, hotel-quality look and feel from the duvet's softness and loft.
- Bed fit
- Double duvet (84 x 90) overhangs a standard double bed.
- Washing
- Cold water wash, gentle cycle; low-heat or air dry only.
- Fluffing
- Daily shaking/fluffing needed to redistribute fill.
- Corner ties
- No corner loops; secure inside cover with ties or clips.
- Fill stability
- Buyers report fill shifts daily, even when attached at all corners.
- Fill properties
- Medium loft and lower breathability than down; casing boosts breathability, and fill is hypoallergenic and moisture-wicking.
Product record
- Title
- TencelTm Lyocell Symphonie Duvet Cooling Casing
- Brand
- Simons Maison
- Price
- 100 CAD
- Availability
- In stock
Deep Research
How it stacks up against other cooling duvets
- The Simba Hybrid 3-in-1 cooling duvet, which uses patented Stratos phase-change technology, starts at £249 for a single and £349 for a double; its price highlights that the Simons duvet at $49.95 CAD — roughly one-tenth the cost for a single — offers a minimal-material cooling solution for those who want Tencel thermoregulation without the tech premium.
- A basic Tencel duvet cover set from Bare Home retails at $70.71 USD on sale, while the Dorma Adelina cover costs £215 and the Juniper Large Duvet Cover is $340 USD — all are covers without fill — making the Simons duvet’s $49.95 CAD price for a complete 300-thread-count Tencel insert with recycled polyester fill dramatically less expensive than even the most affordable cover-only option.
- The Harbor House comforter pairs a nylon shell with Tencel fill at $159.99 USD; the Simons duvet delivers a more breathable, moisture-wicking 300-thread-count Tencel casing at $49.95 CAD, offering a superior shell material at roughly one-third the cost.
How Tencel lyocell actually keeps you cool
- The fibre’s cooling power is built into its nano-scale architecture: a compact core, a porous middle zone, and a semi-permeable skin form a moisture-absorbing capillary network that buffers vapour release — this physical structure, not a chemical finish, is what gives the duvet casing its persistent thermoregulation.
- TENCEL™ lyocell fibres wick sweat directly into the fibre’s interior rather than letting it pool on the fabric surface, so the duvet casing stays dry and cool against the skin even on humid nights — unlike cotton, which holds moisture in its structure but feels damp to the touch.
- Lenzing’s microfibre technology embeds the cooling capability into the fibre itself — it won’t wash out or degrade — so the duvet’s thermoregulation stays effective through years of machine washing, not relying on a temporary coating like some synthetic wicking finishes.
- Each TENCEL™ lyocell filament is round and smooth, giving the 300-thread-count casing a naturally silky, cool-to-the-touch sensation that signals immediate thermal relief — a tactile advantage that conventional cotton, with its flat, twisted fibres, cannot replicate.
- TENCEL™ lyocell absorbs up to 50% more moisture than cotton, which means it removes perspiration from your skin faster and in greater volume, sustaining the evaporative cooling effect through the night instead of saturating and becoming clammy like a cotton casing would.
- TENCEL™ lyocell fibres automatically adjust their moisture absorption rate in response to changes in body temperature — absorbing more when you warm up, less when you cool down — so the casing works with your natural sleep cycle to prevent both overheating and overcooling.
- Because moisture is absorbed into the fibre rather than sitting on the surface, the duvet casing inhibits the growth of odour-causing bacteria that create a stale, clammy feel — lab tests show TENCEL™ lyocell supports significantly lower bacterial growth than cotton or polyester, keeping the cooling sensation fresher between washes.
Recycled polyester fill benefits and sustainability
- It takes about 35 recycled PET bottles to produce one kilogram of recycled polyester fiber, giving the duvet a tangible 'bottle redemption' metric—each unit effectively repurposes plastic that would otherwise remain in landfills for centuries, a concrete eco-metric for sustainability-focused buyers.
- The recycled polyester fill is manufactured from discarded PET plastic bottles, which are shredded, melted, and re-spun into fiber—transforming landfill-bound waste into a plush insulation layer and reducing the duvet's environmental footprint compared to virgin polyester production.
- Recycled polyester fiber absorbs less than 1% moisture, making it naturally inhospitable to dust mites, mold, and bacteria—this inherent material property is what makes the fill hypoallergenic and odourless, offering an advantage for allergy-prone sleepers beyond simple synthetic material claims.
What 300 thread count means for Tencel
- Unlike cotton, which requires multiple washes to soften, a 300-thread-count TENCEL lyocell casing feels silky-smooth and soft from the very first night because the lyocell fiber is naturally finer than cotton — there’s simply less surface friction against your skin.
- At 300 threads per square inch, the casing remains open enough for TENCEL’s moisture-wicking to operate fully — the fiber absorbs roughly 50% more moisture than cotton and releases it quickly, so the duvet surface stays dry even in warmer sleep environments.
- Because the fiber structure is intrinsically smoother, a 300-thread-count TENCEL casing delivers a more luxurious skin feel than a 600-thread-count cotton duvet cover — the higher cotton count can’t match the native slipperiness of the lyocell surface.
- Think of the 300 thread count as a structural enabler rather than a quality claim — the duvet’s cool, smooth character comes from the Lenzing TENCEL lyocell fibers, which naturally feel silky at any viable count; the 300 TC simply gives the fabric enough density to hold its shape without stifling the fiber’s temperature-regulating breathability.
Image Analysis
3 images- 01
Product
White duvet/casing laid on a bed, shown from a front-right angle with visible quilting stitch lines and a stitched leaf-shaped emblem at the lower-right corner. The fabric appears smooth with a slight sheen and a piped edging along the top fold.
- Overall surfaceSingle-layer white duvet cover visible across the bed surface with a smooth, slightly lustrous fabric and shallow vertical drape folds.
1 region
x 0.00 · y 0.18 · w 1.00 · h 0.68 (high) - Quilted stitch patternRegularly spaced, shallow square tufting created by stitched intersections visible across the duvet surface.
1 region
x 0.05 · y 0.28 · w 0.90 · h 0.48 (high) - Top folded edge with pipingUpper edge folded back to reveal a piped seam running along the fold and a visible inner layer; fold extends from center toward the right side.
1 region
x 0.45 · y 0.10 · w 0.55 · h 0.20 (high) - Leaf-shaped stitched emblemDistinct stitched emblem in a leaf or feather motif located near the lower-right corner of the duvet, formed by denser quilting lines.
1 region
x 0.78 · y 0.72 · w 0.18 · h 0.20 (high) - Corner drapeLower-right corner of the duvet drapes down and rounds toward the floor, showing the duvet thickness and pliability.
1 region
x 0.76 · y 0.76 · w 0.24 · h 0.22 (high)
Other
Interior staging with a neutral wall and wood floor; soft directional lighting from the top right casts subtle shadows and highlights across the duvet. Image is cropped to show the right-front portion of the bed.
- Background and surfacePlain light beige wall with white baseboard and medium-tone wooden floor visible behind and beneath the bed.
2 regions
x 0.00 · y 0.00 · w 1.00 · h 0.30 (high); x 0.00 · y 0.86 · w 1.00 · h 0.14 (high) - Shot compositionThree-quarter frontal view focused on the center-right portion of the bed; pillows partly visible behind the top fold; lower-left edge of bed cropped out.
- Lighting and shadowSoft, diffused directional light from the top-right causing gentle highlights on the fabric sheen and faint shadows in the tufting and drape folds.
Colors
bright white· duvet main surface#F1F1F3bright white· stitched leaf emblem#F1F1F2- Overall surfaceSingle-layer white duvet cover visible across the bed surface with a smooth, slightly lustrous fabric and shallow vertical drape folds.
- 02
Product
Right-side view of a bed showing a white duvet cover/casing and two white pillows; visible features include sewn baffle or quilted square tufting, a folded top edge seam, and pillowcase flanges.
- Pillow geometryTwo rectangular pillows placed near the head of the bed; the right pillow is fully visible and shows a slightly rounded filled profile with soft wrinkles across the face.
1 region
x 0.18 · y 0.10 · w 0.58 · h 0.20 (high) - Pillowcase flangePillowcases have a visible outer flange or turned hem that extends beyond the pillow edge on the right pillow, forming a narrow flat border along the open side.
1 region
x 0.57 · y 0.15 · w 0.18 · h 0.12 (high) - Duvet surface tuftingDuvet top shows a grid of shallow square tufting or stitched baffles creating subtle square depressions across the surface.
1 region
x 0.05 · y 0.40 · w 0.90 · h 0.52 (high) - Duvet top seam/foldA folded top edge or turned seam runs horizontally near the upper third of the duvet, with a narrow visible stitch line along the fold.
1 region
x 0.04 · y 0.30 · w 0.92 · h 0.12 (high) - Fabric finishFabric appears smooth with a soft low-sheen finish; light creates gradual highlights and soft shadows revealing subtle wrinkles and drape.
- Right-side dropDuvet hangs slightly over the right edge of the mattress, exposing a narrow vertical tail of fabric near the bottom-right corner of the image.
1 region
x 0.86 · y 0.36 · w 0.12 · h 0.48 (high)
Other
Indoor staged product photograph showing the bed against a plain textured wall and wooden floor; soft directional lighting from the left casts shadows across the bedding.
- Shot compositionFramed from a slightly elevated angle facing the head and right side of the bed, cropping the left pillow partially and showing the mattress top and duvet foreground.
- Background and surfaceBeige textured wall behind the bed and a narrow strip of medium-toned wooden floor visible at the bottom-right edge.
2 regions
x 0.00 · y 0.00 · w 1.00 · h 0.35 (high); x 0.82 · y 0.86 · w 0.18 · h 0.14 (high) - Lighting and shadowsSoft directional light from left creates horizontal bands of light and shadow across the duvet and pillow surfaces, producing visible highlight gradients.
- Image qualityHigh resolution, well focused with natural color and no visible text or branding in the frame.
Colors
bright white· duvet cover surface#F2F1F4bright white· pillowcase surface#DDD3CA- Pillow geometryTwo rectangular pillows placed near the head of the bed; the right pillow is fully visible and shows a slightly rounded filled profile with soft wrinkles across the face.
- 03
Product
Close-up of a white duvet casing corner showing folded edge, corner tie loop, and reinforced stitched seam on smooth, slightly lustrous fabric.
- Corner tie loopA narrow fabric loop emerging from the seam at the corner, formed from the same white fabric and lying flat across the surface.
1 region
x 0.29 · y 0.16 · w 0.48 · h 0.18 (high) - Reinforced stitched seamVisible double-row topstitching along the folded edge forming a reinforced seam; stitches are even and parallel to the edge.
1 region
x 0.58 · y 0.08 · w 0.36 · h 0.70 (high) - Folded corner constructionCorner is folded over with an inner folded flap creating a layered edge; inner fold creates a soft rounded corner profile.
1 region
x 0.22 · y 0.10 · w 0.56 · h 0.38 (high) - Fabric surface finishSmooth, tightly woven fabric with a soft sheen reflecting light, suggesting a sateen-like finish visible across the main surface.
- Light shadow and textureSubtle shadows and highlights emphasize slight surface drape and gentle creasing near the corner and loop area.
Other
Studio-style close-up with neutral background, soft directional lighting from upper left, and no props or text; image is vertically oriented and slightly cropped at edges.
- Shot compositionTight detail shot filling the frame with the product corner positioned toward the upper center-right and negative space below.
- Background and lightingPlain light background with soft directional lighting creating gentle shadows and highlights on the fabric surface.
- Image cropEdges of the fabric extend to the image borders and some parts of the product are cropped outside the frame.
Colors
soft white· main fabric#F3F1F4- Corner tie loopA narrow fabric loop emerging from the seam at the corner, formed from the same white fabric and lying flat across the surface.
Documents & Data
Customer Reviews
51 total51 reviews · out of 5
Soft!
This duvet is one of the best duvets I’ve ever touched. It is very fluffy and soft and lets me sleep like a baby.
Trop grand pour notre king
Trop grand pour notre king
répond tout à fait à
répond tout à fait à mes attentes
Très belle et légère.
Fait très bien sur notre lit.
Too warm for a 3 season duvet.
Good quality but warmer than I expected.
Quand même pesante pour une
Quand même pesante pour une couette d’été, je suis déçue.
Amazing
I chose this duvet because it seemed light but substantial, and had cooling which I prefer, and it doesn’t disappoint! A nice big duvet that is incredibly soft, it’s literally like sleeping in the clouds. Love so much.
Nice Duvet but
This duvet feels so light and fluffy but the reason for this purchase was that it would be the ideal summer duvet, not too warm. I had purchased a summer weight down duvet but had to return it as it was impossible to sleep with it. It was too warm. Fortunately this one is less warm for summer nights but still too warm for me
Couette symphonie
J’adore! Doux et confortable.
Belle qualité
Belle qualité
Fantastic
No issues, as described.
Feels like sleeping in clouds
Love the duvet but will keep it for winter. It’s very lightweight but still warm. Also very fluffy. Purchased cooling blanket from Costco for summer.
Confo
Mon garçon dit dormir dans un nuage….
Très douce, mais mauvaise finition
La couette comme telle est super douce, super moelleuse, juste assez légère, mais réconfortante aussi. Par contre, la finition laisse à désirer. . . Les coutures qui tiennent la bourure en place sont décousues à de nombreux endroits. Nous avons échangé la première couette pour cette raison et la deuxième était encore pire, donc ce n'est pas un problème isolé. Simons m'a toutefois offert un bon service pour me dédommager, donc 3 étoiles au total.
Très bon achat !
C'est exactement ce que je voulais
Belle couette
Belle couette
Super fluffy and cozy but NOT cooling
I purchased this duvet instead of one on sale at the time Because of the claim to be cooling. It is the hottest duvet I’ve ever owned (doesn’t bother me) but my husband refuses to use it.
Comparatively not the best but not bad either
I have another Simon's duvet from Costco that is one of the best duvet I have ever used. It's pure cotton and it's not in stock.
On aime
Légère et confortable!
Légère
Légère
Tellement douce
Tellement douce
elle est énorme et dépasse
elle est énorme et dépasse largement, mon lit, double ,des 2 cotés
Superbe couette
J'adore sa grandeur et sa régulation de la chaleur. Très satisfaite de mon achat
Perfect
Soft and fluffy, not to hot or cold.
bon acaht
Très légère et confortable
Légère et chaude
Très légère en terme de poids, mais très chaude. Combo parfait selon mes goûts
Couette
Excellente !
Confortable
Oui
Just the right temperature
Love it. I had purchase a different duvet that was all year, but it was way too warm for me. This one is much better. Still fluffy and warm without being too much.
Comfy!
A good mid-weight, and very comfy!
Léger et doux
J’ai apprécié cet article.
Très légère je recommande cet
Très légère je recommande cet article
couette
Très bien pour le prix
Trop chaude
Trop chaude
Chaude et légère
On adore!
Pas parfaite
Premièrement, elle devait être "fraiche", mais je la trouve très chaude. Le tissus la rend vraiment glissante, alors même si elle est attachée aux 4 coins, elle doit être "fluffée" à tous les matins. Elle est tout de même bien conçue et de qualité.
Fraicheur
Je n'avais pas vu touché cette couette avant de l'acheter. Je croyais qu'elle ne serait pas si chaude, mais si c'est pour quelqu'un de normal elle est beaucoup trop chaude. Ok, nous sommes l'été, mais chez moi, la température est régulée par une thermopompe et j'ai beaucoup trop chaud avec cette couette. La description est erronée.
Confortable mes trouve quel tiens
Confortable mes trouve quel tiens pas avec la couette il faut toujours que je la replace
Exactement ce que je voulais
Exactement ce que je voulais
Très satisfaite
Exactement ce que je cherchais tant au point de vue qualité que du prix, je la recommande.
So lofty and comfortable
It feels like I'm sleeping in a 5 star hotel bed every night. would 100% buy again.
Parfaite
Parfait pour l’été. La couette est légère, aérienne et respirante.
5
5
Légère et chaude
Idéale pour l’automne et l’hiver. Je recommande.
Très confortable
J’adore cette douillette. Légère et chaude , elle est parfaite!
Parfaite pour les entre-saisons
Couette parfaite pour le printemps et l’automne et même le début de l’hiver. Pour ceux qui ont toujours chaud vous l’aimerez tout l’hiver. Superbe texture et qualité
légère
appréciée
So fluffy!
This duvet is so fluffy and I absolutely love it. It has the over-stuffed cozy look and feel when it's in the duvet cover which I have always wanted in my bedding. I am a very hot sleeper and I find that I am still ok with this duvet on me (at least partially) in July. I washed it as soon as I got it and hung it up to dry, which went well. I just feel so cozy in bed now, and I'm really happy with this purchase.
Couette
Légère et confortable
Une couette parfaite
Je suis très satisfaite de cette couette. Elle est légère, chaude mais elle s’adapte parfaitement à la température ambiante. On dors avec elle comme si un nuage nous enveloppe.
Excellent produit
Excellent produit
Q&A
5 answered- Is the TENCEL lyocell casing OEKO-TEX certified or made from sustainably sourced fibers?
- TENCEL™ Lyocell fibers are made from wood sourced from certified (FSC® or PEFC) or controlled wood sources, ensuring sustainable forestry [1][2]. The fiber production process is EU Ecolabel certified for reduced environmental impact [1]. While OEKO-TEX certification is common for TENCEL™ products, it is not explicitly stated for this duvet's casing.
- What is the recommended washing and drying temperature to prevent shrinkage and maintain the cooling properties?
- To prevent shrinkage and maintain cooling properties, wash this duvet in cold water (30°C/86°F) on a gentle cycle with mild detergent, and avoid hot water above 40°C [3][4]. Tumble dry on low heat or air dry flat away from direct sunlight; high heat can damage the fibers [4].
- Does this duvet have corner loops or ties to secure it inside a duvet cover?
- This duvet does not have corner loops or ties; it uses sewn-through box construction to keep the fill evenly distributed and prevent shifting. If you prefer to secure it inside a duvet cover, you may need a cover with internal ties or use duvet clips.
- How does the recycled polyester fill compare to down or down alternative in terms of loft and breathability?
- Recycled polyester fill offers a plush, medium loft that is less lofty and breathable than natural down but comparable to typical down alternative fills. The TENCEL™ Lyocell casing enhances breathability and moisture wicking, partially offsetting the fill's lower breathability. It provides good warmth without the weight of down.
- Is the duvet suitable for year-round use or primarily for warm weather?
- This duvet is designed primarily for warm weather or hot sleepers, as the TENCEL™ Lyocell casing is lightweight, moisture-wicking, and thermoregulating to keep you cool [product description]. The recycled polyester fill adds some warmth, making it suitable for year-round use in temperate climates or for those who sleep warm—but it may not be warm enough for cold winters without additional layering.