
I.FIV5
Responsible Merino Wool Thermal Legging
The Responsible Merino Wool Thermal Legging is a full-length, close-fitting base-layer legging made from a 250 GSM merino wool blend techno knit, with wool sourced from certified farms using responsible practices. It features a covered elastic high-rise waistband, flat seams for comfort, and a reflective i.FiV5 logo, and is designed in Canada. It is intended for thermal layering and cold-weather training or everyday wear; it has a 4.78/5 rating from 32 reviews.
- Material
- 250 GSM merino wool blend techno knit
- Style
- athleisure, activewear, minimal, high-rise, layering-piece, performance, sustainable
- Category
- Apparel & Accessories > Clothing > Activewear
Specifications
Clean, effortless high-rise thermal legging in a 250 GSM merino wool blend techno knit, designed in Canada as an exclusive i.FiV5 by Simons style.
250 GSM merino wool blend techno knit, covered elastic high-rise waistband, flat seams for maximum comfort, reflective i.FiV5 logo, responsibly sourced certified wool.
- Material
- 250 GSM merino wool blend techno knit
- Style
- athleisure, activewear, minimal, high-rise, layering-piece, performance, sustainable
- Occasion
- workout, loungewear, everyday, travel, running-errands, homewear, yoga
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- 250 GSM merino wool blend techno knit
- wool sourced from certified farms with responsible practices
- covered elastic waistband
- high-rise elastic waist
- flat seams for maximum comfort
- reflective i.FiV5 logo
- clean and effortless fitted legging silhouette
- thermal insulation for cold-weather layering
- temperature-regulating multi-talented fiber beloved by athletes
- exclusive design developed in Canada by Simons
- i.FiV5 by Simons in-house collection
Product Insights
80% responsible merino wool, 20% reprocessed polyester 250 GSM merino-blend techno knit True to size with a 32 in / 81.5 cm inseam Serious cold-weather warmth, with buyers reporting comfort down to -20°C and in wet heavy snow Machine wash inside out in cold water; no bleach or fabric softener High-merino knits dry more slowly than synthetics
Verified claims
- material
- 80% responsible merino wool, 20% reprocessed polyester
- fabric_weight
- 250 GSM merino-blend techno knit
- sourcing
- Wool sourced from certified farms with responsible practices
- fit
- True to size with a 32 in / 81.5 cm inseam
- waistband
- Covered elastic high-rise waistband with flat seams
- comfort
- Soft, non-itchy next-to-skin merino comfort for full-day wear
- warmth
- Serious cold-weather warmth, with buyers reporting comfort down to -20°C and in wet heavy snow
- moisture_management
- Wicks moisture quickly and breathes to prevent clamminess
- thermoregulation
- Merino thermoregulates: warm when cold, cooler when moving indoors
- odor
- Naturally odor-resistant between washes
- durability
- Washes well and holds up over seasons, according to repeat buyers
- care
- Machine wash inside out in cold water; no bleach or fabric softener
- drying
- Reshape and lay flat to dry; do not tumble dry, iron or press
- maintenance
- Airing between wears can replace frequent washing
- construction
- Flatlock seams, contoured front fly and ribbed ankle cuffs
- use_cases
- Snowboarding, extreme-cold daily wear, all-day work and gifting
- layering
- Wear as a snug base layer under a mid-layer and shell; avoid cotton next to it
- tradeoff
- High-merino knits dry more slowly than synthetics
Product record
- Title
- Responsible Merino Wool Thermal Legging
- Brand
- I.FIV5
- Price
- 89 CAD
- Availability
- In stock
- Rating
- 4.78 stars, 32 reviews
Buying Guide
0 comparisons · 1 sourceUses
Snowboarding base layer for cold days
According to customer reviews, these merino wool leggings work as a base layer for snowboarding in temperatures around 0 to -6 degrees C. Reviewers report the fabric wicks moisture quickly and layers comfortably under a light shell without overheating.[1]
Daily base layer for extreme cold down to -20°C
Merino thermal leggings worn for daily wear in extreme cold; per review analysis, they hold heat while staying soft and comfortable, and reviewers report staying warm down to -20°C and in wet heavy snow without bulk.[1]
All-day wear for work and casual days
Wear these merino wool thermal leggings under clothes for full days that mix indoor and outdoor activity, whether for work or casual outings. Reviewers describe the fabric as soft, non-itchy, and breathable enough to stay comfortable without feeling clammy, while still holding in warmth.[1]
A low-risk gift for husbands and other men on your list
This merino wool thermal legging works well as a gift, especially for husbands. Sizing is straightforward for buyers—those ordering their usual pant size, like 31/32, report it fits as expected—and the washable fabric makes it easy to care for. Together, the true-to-size fit and easy washing help take the guesswork out of gifting.[1]
Image Analysis
3 images- 01

Product
A pair of dark, slim-fitting thermal leggings shown on a model from just below the waist to the ankles; visible flatlock seams, a contoured front fly seam, and a fitted elastic waistband are visible.
- SilhouetteClose-fitting full-length legging silhouette that tapers from the thigh to the ankle, shown on a standing model.
1 region
x 0.18 · y 0.12 · w 0.64 · h 0.82 (high) - WaistbandElasticated waistband visible at the natural waist with a narrow exposed top edge and a slightly lighter inner band visible under the hem of the top.
1 region
x 0.33 · y 0.12 · w 0.34 · h 0.06 (high) - Front fly seamVertical contoured front fly seam with reinforced stitching that runs from the waistband down the center front and curves toward the inner thigh.
1 region
x 0.40 · y 0.18 · w 0.20 · h 0.32 (high) - Flatlock seamsVisible flatlock seam lines in a slightly lighter thread run along the inner and outer leg panels and outline the front contour, producing a paneled construction appearance.
1 region
x 0.30 · y 0.20 · w 0.40 · h 0.66 (high) - Fabric textureSoft knit texture consistent with a thermal or wool-blend fabric; surface shows subtle heathering and fine nap under studio lighting.
1 region
x 0.22 · y 0.22 · w 0.56 · h 0.60 (medium) - Ankle finishLeg openings finish close to the ankle with a slight gathering at the cuff where socks begin, showing the hem sits directly above the sock line.
1 region
x 0.25 · y 0.77 · w 0.50 · h 0.18 (high)
Other
Studio product shot showing the model from waist to feet against a plain white background with even studio lighting; model's hands are visible and socks are worn as styling props.
- Shot compositionVertical studio crop framing the model from just below the top of the torso to the floor, centered horizontally.
- Background and lightingEven, high-key white background with soft shadowing beneath the feet indicating diffuse studio lighting from above.
- Styling propA pair of black and dark grey socks are worn by the model and extend up over the ankle; these appear as styling props separate from the legging.
1 region
x 0.20 · y 0.82 · w 0.60 · h 0.14 (high) - Model croppingImage is cropped above the hips so only the lower torso, legs, hands, and feet of the model are visible; top of head and upper torso are outside frame.
Colors
very dark navy· main fabricmedium grey· stitching and seam trim- SilhouetteClose-fitting full-length legging silhouette that tapers from the thigh to the ankle, shown on a standing model.
- 02

Product
Rear view of a fitted long thermal legging worn by a model. Visible details include contoured rear seam, visible side and inner leg seams, elasticized ankle cuffs, and a small square logo on the left outer thigh.
- Overall silhouetteClose-fitting full-length legging shown from the rear on a standing model; the garment follows the leg contours and tapers to the ankle cuffs.
1 region
x 0.20 · y 0.14 · w 0.60 · h 0.82 (high) - Rear seamSingle vertical seam runs down the center back from the waist area toward the crotch, visible as a subtle stitched line.
1 region
x 0.46 · y 0.20 · w 0.12 · h 0.28 (high) - Side and inner leg seamsVisible external stitching lines along the outer side of each leg and an inner-leg seam on the right leg, shown as slightly raised stitch lines.
2 regions
x 0.32 · y 0.22 · w 0.12 · h 0.66 (high); x 0.56 · y 0.28 · w 0.12 · h 0.62 (high) - WaistbandElasticized waistband visible at the top of the image where the top garment meets the waist; sits flat without a visible drawcord.
1 region
x 0.36 · y 0.12 · w 0.28 · h 0.08 (medium) - Ankle cuffsElasticized ribbed cuffs at each ankle that gather the fabric slightly above the socks.
1 region
x 0.30 · y 0.84 · w 0.40 · h 0.10 (high) - Left thigh logo patchSmall square logo or patch located on the outer left thigh, lighter in tone than the main fabric.
1 region
x 0.30 · y 0.36 · w 0.06 · h 0.06 (high) - Fabric textureKnit textile with a smooth, slightly heathered appearance visible on leg surfaces; fine surface fuzz and soft nap apparent in close areas.
1 region
x 0.28 · y 0.30 · w 0.44 · h 0.50 (medium)
Other
Studio product shot showing a model from the rear against a plain white background; soft even lighting with minimal shadows. Model hands and socks visible; image cropped just above the waist and includes full legs and feet.
- Background and lightingEven white studio background with soft, diffuse lighting producing minimal cast shadows beneath the feet.
- Model presence and poseA standing model is shown from the rear with arms relaxed at sides; hands are partially visible and rest near the hips.
2 regions
x 0.12 · y 0.18 · w 0.16 · h 0.36 (high); x 0.72 · y 0.18 · w 0.12 · h 0.36 (high) - Socks and footwearModel wears two-tone socks with darker soles and lighter heel/cuff panels; socks appear as separate garments and are not part of the legging itself.
2 regions
x 0.24 · y 0.86 · w 0.20 · h 0.12 (high); x 0.56 · y 0.86 · w 0.20 · h 0.12 (high) - Image cropFrame is cropped slightly above the waist so the top of the upper garment is partially visible and the model's head is outside the frame.
Colors
very dark navy / black· main fabricvery dark navy / black (ribbed)· ankle cuff ribbingmuted light gray· left thigh logo- Overall silhouetteClose-fitting full-length legging shown from the rear on a standing model; the garment follows the leg contours and tapers to the ankle cuffs.
- 03

Product
A full-length slim-fit thermal base layer set in a dark charcoal color: a long-sleeve zip mock-neck top and matching tapered leggings with visible flatlock seams and a small square logo patch at the hem of the top.
- Overall silhouetteModel wears a matching two-piece thermal set: a long-sleeve, close-fitting mock-neck top with a short front zipper and full-length tapered leggings that fit snugly along the legs to the ankles.
1 region
x 0.18 · y 0.03 · w 0.64 · h 0.94 (high) - Top constructionLong-sleeve zip mock-neck top with a short centered front zipper that stops at the upper chest; raglan-style shoulder seams and visible contrast flatlock stitching along side panels and sleeves.
1 region
x 0.25 · y 0.03 · w 0.50 · h 0.45 (high) - Legging constructionFull-length slim/tapered leggings with contoured seam lines on the front and inner leg flatlock seams; visible reinforced-looking stitching at the crotch area forming a subtle panel shape.
1 region
x 0.26 · y 0.45 · w 0.48 · h 0.48 (high) - Hem and ankleLeggings continue into the ankle region where fabric meets dark socks; ankle area appears tapered and sits under the ankle bone.
1 region
x 0.28 · y 0.86 · w 0.44 · h 0.11 (high) - Fabric appearanceFine, smooth knit texture consistent across top and leggings with slight heathering visible under lighting; fabric appears relatively thin and form-fitting.
1 region
x 0.25 · y 0.12 · w 0.50 · h 0.78 (high) - Brand patchSmall square logo patch located at the lower left front hem of the top.
1 region
x 0.47 · y 0.49 · w 0.03 · h 0.03 (medium)
Other
Studio product shot showing a standing male model against a plain white background with soft lighting and minimal shadows; image is a full-body vertical crop centered on the model.
- Shot compositionFull-body, front-facing portrait of a standing model centered in frame with headroom and visible floor; model faces slightly toward camera.
- Background and lightingEven white studio background with soft diffuse lighting that casts faint, soft shadow under the model toward the front-left of frame.
- Props and stylingModel is wearing dark socks that contrast slightly with the leggings; socks appear as styling props rather than separate packaging.
1 region
x 0.32 · y 0.84 · w 0.35 · h 0.13 (high) - Image qualityCrisp, high-resolution image with clear edges and visible fabric texture; no motion blur.
Colors
dark charcoal· main fabric (top and leggings)#110E13medium heather gray· contrast seams and stitch linesoff-white· logo patch at top hemdark slate gray· sock toes and heels#4C4A55- Overall silhouetteModel wears a matching two-piece thermal set: a long-sleeve, close-fitting mock-neck top with a short front zipper and full-length tapered leggings that fit snugly along the legs to the ankles.
Variants
16 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 3913507 | Responsible Merino Wool Thermal Legging - Black - Small | CA$89.00 | Yes |
| 3913508 | Responsible Merino Wool Thermal Legging - Black - Medium | CA$89.00 | Yes |
| 3913509 | Responsible Merino Wool Thermal Legging - Black - Large | CA$89.00 | Yes |
| 3913510 | Responsible Merino Wool Thermal Legging - Black - X-Large | CA$89.00 | Yes |
| 4705204 | Responsible Merino Wool Thermal Legging - Grey - Small | CA$89.00 | Yes |
| 4705205 | Responsible Merino Wool Thermal Legging - Grey - Medium | CA$89.00 | Yes |
| 4705206 | Responsible Merino Wool Thermal Legging - Grey - Large | CA$89.00 | Yes |
| 4705207 | Responsible Merino Wool Thermal Legging - Grey - X-Large | CA$89.00 | Yes |
| 4705208 | Responsible Merino Wool Thermal Legging - Mossy Green - Small | CA$89.00 | Yes |
| 4705209 | Responsible Merino Wool Thermal Legging - Mossy Green - Medium | CA$89.00 | Yes |
| 4705210 | Responsible Merino Wool Thermal Legging - Mossy Green - Large | CA$89.00 | Yes |
| 4705211 | Responsible Merino Wool Thermal Legging - Mossy Green - X-Large | CA$89.00 | Yes |
| 4706966 | Responsible Merino Wool Thermal Legging - Navy/midnight Blue - Small | CA$89.00 | Yes |
| 4706967 | Responsible Merino Wool Thermal Legging - Navy/midnight Blue - Medium | CA$89.00 | Yes |
| 4706968 | Responsible Merino Wool Thermal Legging - Navy/midnight Blue - Large | CA$89.00 | Yes |
| 4706969 | Responsible Merino Wool Thermal Legging - Navy/midnight Blue - X-Large | CA$89.00 | Yes |
Documents & Data
Customer Reviews
32 total32 reviews · out of 5
perfect fit
perfect fit
Ce legging est vraiment thermique, doux, confortable !
Grandeur exacte ( je porte du 31 ou 32 quant aux pantalons) j’ai pris une chance pour la grandeur petite du legging: il convient parfaitement, est chaud à moins vingt Celsius et est doux et confortable. Bravo !
Très apprécié
Très efficace et je le recommande
Chaud et confo
Chaud et confo
Sous-vêtement long en laine mérinos
Mon conjoint apprécie le confort qu’offre la laine mérinos de même que la coupe de cette pièce de vêtement bien chaude
confortable
confortable
Responsible merino wool thermal legging
Christmas gift for my husband, I bought the set and he loves them, very comfortable, nice fabric and washes up well.
Parfait
Parfait
Un de mes indispensables
Je le renouvelle à chaque année
Confortable
Confortable
doux, chaud et très confortable.
doux, chaud et très confortable.
Beau et chaud
Beau et chaud
Excellent quality at affordable price
The whole line up of responsible merino wool thermal clothing from Simons is of excellent quality and affordable, top and legging. My husband bought both and really likes them ! Also warm and comfortable.
bought for a gift true
bought for a gift true to size and very comfortable
Warm and Compact
Great for snowboarding!
Modern, stylish winter wear
Comfortable & warm in a great colour. Not your father's long johns
Très bien
Doux et confortable
Beau tissu et vêtement chaud.
Beau tissu et vêtement chaud.
Itchy
Itchy
Failure to deliver
The item was not delivered to the store as requested.
Great for slopes
Great in 0° to -6° for snowboarding with a light shell. Wicks moisture quickly.
Leggings super confort
Bon produit de qualité, acceptable à $59. 00 .
Excellent décrive bien le pourcentage
Excellent décrive bien le pourcentage de laine merino
Laine mérinos
Bien fait
Très confortable
Très confortable, tissu de bonne qualité
Very warm, very breathable
Perfect for wet heavy snow winters. Will be using them for both athletic days and simple work days. Very happy
Moelleux
Souple, doux et magnifique couleur. Et que dire du confort: parfait.
Leggings thermique mérinos
Très confortable et chaud
le legging thermique mérinos responsable
très confortable, garde la chaleur tout en laissant le corps respirer.
parfait
parfait
Très confortable.
Très confortable.
Très confortable
Très confortable