
I.FIV5
Responsible Merino Wool Crew-Neck Top
The Responsible Merino Wool Crew-Neck Top is a long-sleeve thermal base layer made from a 250 GSM merino wool blend techno knit, with wool sourced from certified farms using responsible practices. It has a fitted, close-to-body silhouette with raglan sleeves for freedom of movement, flat seams to reduce chafing, a narrow banded crew neckline, a straight hem, and a reflective i.FiV5 logo; it is intended as a first layer for cold-weather activities such as running, hiking, skiing, and everyday winter wear. The top is an exclusive i.FiV5 by Simons design and is rated 4.87 out of 5 based on 39 customer reviews.
- Material
- 250 GSM merino wool blend techno knit; wool sourced from certified farms with responsible practices
- Style
- minimal, activewear, performance, technical, layering-piece
- Category
- Apparel & Accessories > Clothing > Activewear
Specifications
Clean, effortless crew-neck thermal base layer in a 250 GSM responsible merino wool blend techno knit.
250 GSM merino wool blend techno knit, raglan sleeves, flat seams, covered elastic waistband, reflective i.FiV5 logo, and wool sourced from certified farms with responsible practices.
- Material
- 250 GSM merino wool blend techno knit; wool sourced from certified farms with responsible practices
- Style
- minimal, activewear, performance, technical, layering-piece
- Occasion
- workout, sports-event
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- clean and effortless crew-neck silhouette
- 250 GSM merino wool blend techno knit
- thermal base layer
- merino wool sourced from certified farms with responsible practices
- multi-talented fiber suited to athletic wear
- covered elastic waistband
- raglan sleeves for greater freedom of movement
- flat seams for maximum comfort
- reflective i.FiV5 logo
- exclusive i.FiV5 by Simons design
- designed in Canada
- crew neckline
Product Insights
80% responsible merino wool / 20% reprocessed polyester 250 GSM merino blend knit suits cool to moderate temperatures Most find it soft against skin, but a minority report itchiness True to size with a body-skimming base-layer cut Competitive value versus premium merino brands like Icebreaker
Verified claims
- material
- 80% responsible merino wool / 20% reprocessed polyester
- warmth
- 250 GSM merino blend knit suits cool to moderate temperatures
- performance
- Merino regulates temperature and manages moisture
- odor
- Naturally odour-resistant; can be worn multiple times between washes
- comfort
- Most find it soft against skin, but a minority report itchiness
- fit
- True to size with a body-skimming base-layer cut
- fit
- Hem can run short on longer torsos
- construction
- Raglan sleeves improve shoulder movement and fit tolerance
- construction
- Flat seams reduce chafing under layers
- construction
- Slim knit with raglan seams, side-panel seams, narrow cuffs and a straight hem
- visibility
- Reflective i.FIV5 logo adds low-light visibility on all colourways
- care
- Machine wash cold inside out; no bleach or fabric softener
- durability
- Holds up to repeated washing and intense activity, though wool is less tough than synthetics
- styling
- Works as a base layer and as a standalone sweater
- use_case
- Ideal for skiing and snowboarding in 0 to -6°C with just a shell
- use_case
- Breathable enough for high-intensity cold-weather training
- color
- Black, Grey, and Royal/Sapphire Blue; neutrals hide under layers, blue is a styling choice
- variants
- Twelve variants: all four sizes in each of three colours, all in stock at 89 CAD
- value
- Competitive value versus premium merino brands like Icebreaker
- sustainability
- Wool from certified farms with responsible practices; reprocessed polyester
Product record
- Title
- Responsible Merino Wool Crew-Neck Top
- Brand
- I.FIV5
- Price
- 89 CAD
- Availability
- In stock
- Rating
- 4.87 stars, 39 reviews
Buying Guide
1 comparison · 7 sourcesUses
Base layer for skiing or snowboarding in mild cold
...[1]
High-intensity cold-weather training base layer
For hard-charging outdoor workouts in cold weather, customers used or evaluated this merino wool crew-neck top as a layer that keeps the body warm while letting skin breathe. According to a review analysis, reviewers reported not overheating during high-intensity activity in the top.[1]
Everyday Standalone Wear
This top is suitable for everyday standalone wear, blending a soft fabric feel with a nice color. Reviewers note that the merino wool provides a warm touch against the skin, offering all-day comfort when worn on its own.[1]
Skin-tight base layer with careful sizing
Some customers wear this merino crew-neck as a snug base layer. Reviewers say it fits true to size through the chest and shoulders, but sizing down for a tighter fit can make the hem ride up on longer torsos — one XL reviewer found their lower belly exposed — so regular sizing may be needed for coverage. A subset of reviewers also find the blend slightly itchy against bare skin, so a thin layer underneath may help sensitive skin.[1]
Product comparison
Compared within this brand.
| Responsible Merino Wool Crew-Neck Top: Choose this if you want a merino base layer for cold-weather activity: its 250 gsm merino wool blend techno knit is positioned for cool and moderate temperatures, and reviewers report it wicks moisture, keeps them warm without bulk on the slopes in 0 to minus 6 degrees C with just a shell, and stays warm even when wet. It also works as an everyday standalone sweater, with many reviewers describing soft, all-day-comfortable fabric. Note that a subset find the blend slightly itchy against bare skin (some suggest a thin base layer underneath if your skin is sensitive), and the hem can ride up on longer torsos when sizing down, so stick with your regular size if you want coverage.[1,2] | Ultra-Soft Long-Sleeve Tee: Choose this if you prefer an ultra-soft, versatile long-sleeve tee made from an 89% recycled polyester blend and featuring Polygiene® technology for odor and bacteria control. The relaxed fit offers a comfortable, straight drape, though note that the waist is cut short and loose, which may feel disproportionate for wearers with a long torso.[3] | Fresh-Feel Perforated T-Shirt: Choose this if you want a performance t-shirt with a cool feel: it is made of soft, stretchy recycled polyester blend (88% polyester from recycled plastic bottles, 12% spandex) with underarm and back perforations intended for strategic ventilation, plus Polygiene technology that is stated—by the manufacturer—to eliminate odour and prevent bacteria growth. It has a crew neckline, short sleeves, and a relaxed regular fit that falls to just below the hip, available in Black, Ivory/Cream Beige, and Blue in sizes Small to X-Large. Note that the ventilation is the stated purpose of the perforations rather than a verified result, and the fabric's soft drape shows minor wrinkles near the lower front hem in product images.[4,5,6,7] |
Image Analysis
3 images- 01

Product
A model wearing a fitted long-sleeve crew-neck black top layered under a sleeveless quilted puffer vest; a patterned cap is visible on the model's head.
- Crew-neck top - neckline and fitBlack long-sleeve crew-neck shirt visible across the model's chest and arms. The neckline is a close crew style with no visible collar, and the fabric appears smooth and fine-knit with a fitted silhouette.
1 region
x 0.38 · y 0.30 · w 0.44 · h 0.46 (high) - Sleeve constructionLong sleeves extend fully to the wrists and are form-fitting on the forearms; the right sleeve is visible with slight wrinkling at the elbow where the arm is bent.
2 regions
x 0.62 · y 0.12 · w 0.28 · h 0.28 (high); x 0.03 · y 0.05 · w 0.30 · h 0.34 (medium) - Quilted puffer vest - front panelSleeveless black quilted puffer vest layered over the crew top; visible front panels show horizontal curved quilting baffles and a vertical center zipper that is partially open.
1 region
x 0.18 · y 0.22 · w 0.52 · h 0.60 (high) - Vest details - zipper and pocketVisible vertical metal-toothed zipper with fabric zipper tape runs down the vest front; there is a zippered side pocket on the left vest panel with a visible zipper pull.
2 regions
x 0.43 · y 0.30 · w 0.18 · h 0.50 (high); x 0.20 · y 0.46 · w 0.14 · h 0.12 (medium) - CapLow-profile baseball-style cap with a curved brim and a multicolored plaid or checked fabric pattern; brim underside appears darker.
1 region
x 0.34 · y 0.02 · w 0.32 · h 0.17 (high)
Other
Outdoor lifestyle shot showing the model reclining on a wooden picnic bench with a blurred natural landscape in the background. Soft, diffused daylight with mild shadowing on the model.
- Shot compositionThree-quarter view of a seated model leaning back on a wooden picnic table bench, photographed from a slightly low angle that emphasizes the torso and face turned upward.
- BackgroundOut-of-focus natural landscape with muted greens and pale sky tones; background is blurred indicating shallow depth of field.
1 region
x 0.55 · y 0.00 · w 0.45 · h 0.36 (high) - Supporting prop - benchDark-stained wooden picnic table bench with visible wet spots and some orange discoloration on the top surface where the model rests, spanning the lower and left portions of the image.
1 region
x 0.00 · y 0.56 · w 0.82 · h 0.40 (high) - Lighting and shadowSoft, diffused outdoor lighting with gentle shadow along the model's jaw and under the brim of the cap; no harsh highlights.
Colors
matte black· crew-neck topdark charcoal· quilted vestmuted plaid tan-green· cap- Crew-neck top - neckline and fitBlack long-sleeve crew-neck shirt visible across the model's chest and arms. The neckline is a close crew style with no visible collar, and the fabric appears smooth and fine-knit with a fitted silhouette.
- 02

Product
Rear three-quarter view of a male model wearing a long-sleeve, crew-neck knit top in a very dark solid color. Visible are raglan-style shoulder seam, curved side-panel seams with topstitching, long fitted sleeves, narrow crew neckline, straight hem, and a soft knit texture.
- View and fitRear three-quarter view on a model showing a slim, close-to-body fit through the torso and sleeves.
1 region
x 0.20 · y 0.06 · w 0.60 · h 0.88 (high) - NecklineNarrow crew neck with a thin banded finish lying flat against the neck.
1 region
x 0.40 · y 0.04 · w 0.22 · h 0.10 (high) - Shoulder constructionVisible seam lines from the neckline toward the shoulder suggesting a raglan or set-in seam detail with topstitching.
1 region
x 0.33 · y 0.08 · w 0.36 · h 0.18 (high) - Side panel seamCurved vertical side-panel seam on the back extending from under the arm down toward the hem with visible topstitching.
1 region
x 0.28 · y 0.36 · w 0.38 · h 0.46 (high) - Sleeves and cuffsLong, slim sleeves with simple narrow finished cuffs, no visible ribbing or elastic.
2 regions
x 0.06 · y 0.26 · w 0.26 · h 0.58 (high); x 0.64 · y 0.26 · w 0.20 · h 0.60 (high) - HemStraight hem that falls below the waistline with a single row of visible stitching at the edge.
1 region
x 0.28 · y 0.76 · w 0.44 · h 0.16 (high) - Fabric textureFine knit fabric with a slightly brushed or soft woolen surface appearance, matte finish.
1 region
x 0.33 · y 0.18 · w 0.34 · h 0.50 (high) - Color uniformityTop appears in a uniform very dark solid color across body and sleeves without visible pattern or print.
1 region
x 0.28 · y 0.12 · w 0.44 · h 0.72 (high)
Other
Studio shot with a plain light background showing the model from the back and left profile; soft even lighting with minimal shadows; no props or packaging visible.
- Background and compositionPlain light neutral background filling the frame; subject centered left of center with head turned slightly to the left.
- Model poseModel standing upright, weight on right leg, left arm relaxed at side, head turned to show left profile.
1 region
x 0.06 · y 0.02 · w 0.60 · h 0.40 (high) - Lighting and shadowsSoft, diffused studio lighting producing gentle, even illumination and faint shadows under the arm and along the side of the body.
- Image qualityHigh-resolution, sharply focused image with clear detail in fabric texture and seam lines.
Colors
very dark charcoal (nearly black)· body- View and fitRear three-quarter view on a model showing a slim, close-to-body fit through the torso and sleeves.
- 03

Product
Long-sleeve crew-neck knit top in a dark charcoal black with visible raglan-style seams, slim fitted on a model. Small square woven brand tag at the lower front hem.
- Silhouette and fitSlim-fitting long-sleeve crew-neck top shown on a model, with the hem ending near the upper hip and sleeves extending to the wrists.
1 region
x 0.18 · y 0.08 · w 0.64 · h 0.72 (high) - NecklineRound crew neckline with a narrow, slightly raised knit binding.
1 region
x 0.35 · y 0.08 · w 0.30 · h 0.08 (high) - Seam constructionVisible raglan-style shoulder seams and vertical side-panel seams with slightly lighter contrasting stitching running from underarm to hem.
2 regions
x 0.22 · y 0.12 · w 0.32 · h 0.30 (high); x 0.46 · y 0.12 · w 0.30 · h 0.48 (high) - Fabric textureFine knitted, slightly heathered textile surface with a matte finish consistent across torso and sleeves.
1 region
x 0.20 · y 0.14 · w 0.60 · h 0.56 (high) - Lower-hem tagSmall square woven tag sewn to the front lower hem, light gray square on a darker background; logo details not legible.
1 region
x 0.47 · y 0.66 · w 0.05 · h 0.05 (high) - SleevesLong set-in sleeves with the same knit texture and visible seam lines at the shoulder and along the sleeve length; cuffs are finished with the same narrow hem.
2 regions
x 0.18 · y 0.20 · w 0.18 · h 0.54 (high); x 0.64 · y 0.20 · w 0.18 · h 0.56 (high)
Other
Studio shot of a male model wearing the garment against a neutral light-gray background; even lighting with soft shadowing and the image cropped mid-thigh.
- Model and stylingMale model wearing the top and matching dark bottoms; hands visible at sides and head included in the frame.
1 region
x 0.10 · y 0.00 · w 0.80 · h 1.00 (high) - Background and lightingEven studio lighting on a smooth light-gray to white gradient background producing soft, subtle shadows along the model's left side.
- Image cropImage cropped around mid-thigh; lower legs not visible.
1 region
x 0.00 · y 0.60 · w 1.00 · h 0.40 (high)
Colors
dark charcoal black· main body and sleevesdark gray· seam stitchinglight gray· lower-hem tag- Silhouette and fitSlim-fitting long-sleeve crew-neck top shown on a model, with the hem ending near the upper hip and sleeves extending to the wrists.
Variants
12 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 3913493 | Responsible Merino Wool Crew-Neck Top - Black - Small | CA$89.00 | Yes |
| 3913494 | Responsible Merino Wool Crew-Neck Top - Black - Medium | CA$89.00 | Yes |
| 3913495 | Responsible Merino Wool Crew-Neck Top - Black - Large | CA$89.00 | Yes |
| 3913496 | Responsible Merino Wool Crew-Neck Top - Black - X-Large | CA$89.00 | Yes |
| 4705212 | Responsible Merino Wool Crew-Neck Top - Grey - Small | CA$89.00 | Yes |
| 4705213 | Responsible Merino Wool Crew-Neck Top - Grey - Medium | CA$89.00 | Yes |
| 4705214 | Responsible Merino Wool Crew-Neck Top - Grey - Large | CA$89.00 | Yes |
| 4705215 | Responsible Merino Wool Crew-Neck Top - Grey - X-Large | CA$89.00 | Yes |
| 4706977 | Responsible Merino Wool Crew-Neck Top - Royal/sapphire Blue - Small | CA$89.00 | Yes |
| 4706978 | Responsible Merino Wool Crew-Neck Top - Royal/sapphire Blue - Medium | CA$89.00 | Yes |
| 4706979 | Responsible Merino Wool Crew-Neck Top - Royal/sapphire Blue - Large | CA$89.00 | Yes |
| 4706980 | Responsible Merino Wool Crew-Neck Top - Royal/sapphire Blue - X-Large | CA$89.00 | Yes |
Documents & Data
Customer Reviews
39 total39 reviews · out of 5
Bon rapport qualité prix en
Bon rapport qualité prix en comparaison avec d’autres marques écoresponsable. Taille fidèle au descriptif.
Super satisfait!
Excellente fabrication de mérinos à un prix très modique!
Haut col rond laine mérinos
Belle coupe et laine très douce.
Très confortable y grandeur Perfect
Très confortable y grandeur Perfect 👌🏽
Très chaud, très confortable
Très chaud, très confortable
Parfait
Idéal pour activité intense
Haut en mérinos
Parfait
Excellent
« Ça fait la job » Je le recommande
Parfait!
Parfait!
Le haut col rond en mérinos
Mon conjoint aime beaucoup la qualité de ce chaud sous-vêtement: en preuve, il en a désiré un second! La laine nous garde au chaud même mouillée, elle est confortable et la couleur bleue est bien belle
Warm and layers
Have 2 colours. Wash great, nice feel to keep out the cold. Wear it not just as base but on its own.
Responsible merino wool crew neck top
Bought the set for my husband at Christmas, he's very happy with them. Nice and warm, fabric is comfortable. Washes up well.
Perfect for base
Warm and good stitching
Parfait!
Parfait!
Runs a bit small but good stretch
I am typically a medium and got a large, which made the item more comfortable. A good base layer.
Super qualité prix
Très beau, très confortable et chaud pour le sport. Beaucoup plus abordable que d'autres marques et plus résistant avec 80% de mérinos au lieu de 100%. Je recommande +++
Fantastic merino top
Reasonably priced beautiful merino top. Feels great on the skin. Fits just right.
Great product, comfortable
Great product, comfortable
Warm and thick
A nice alternative to the pricier options as icebreaker, same sizing. I would say even thicker, but a bit on the itchy side.
Great but a little itchy
Great but a little itchy
lovely
great colour and material, thank you
Beau et chaud
Beau et chaud
Très confortable, mais un peu court
Très confortable, mais un peu court au niveau du ventre. Je porte normalement du XL, mais j’ai du prendre large pour qu’il soit bien collé à ma peau… cela fait en sorte que le bas de mon ventre est un peu à découvert.
bought for a gift was
bought for a gift was told true to size and very comfortable
Warm and Compact
Great for snowboarding!
Très confortable
Très confortable
je l'ai adopté
Il est devenu un de mes préférés; tout aussi performant que certains produits équivalents plus chers.
Great active wear
Perfect for hitting the slopes in the 0 to -6° range with just a shell on. Have not tried colder or warmer weather yet. Quickly wicks moisture.
Super confortable
Super confortable
confortable
très belle qualité
Bien chaude.
Bien chaude.
Great value
Beautiful quality and great value for merino
Tout aussi confortable
Parfait
Très belle qualité
Très belle qualité
Nice enough to wear as
Nice enough to wear as a sweater
Magnifique
Je l'aime beaucoup
Haut col rond
Très confortable et chaud
Le haut col rond mérinos responsable
garde le corps au chaud tout en le laissant respirer
Livraison rapide
Impressionné par la rapidité de la livraison et la qualité du vêtement. Merci !