
Smartwool
Thermal Merino 250 Legging
Smartwool Thermal Merino 250 Legging is a full-length, form-fitting base-layer legging made from a 250 g 100% merino wool knit, intended for warmth and moisture management in cold-weather activities such as skiing and for indoor wear. It has a high-rise elastic waistband, flatlock flat seams, and a tapered ankle-length cut. The black knit fabric has a smooth matte surface, with a small ankle tag and logo detail.
- Material
- 250 g 100% merino wool knit
- Style
- activewear, loungewear, performance, technical
- Category
- Apparel & Accessories > Clothing > Activewear
Specifications
Warm thermal base layer legging in 250 g merino wool for cold-weather activities and lounging.
250 g 100% merino wool knit, thermal resistance for extreme conditions, moisture-wicking, elastic waistband, flat seams
- Material
- 250 g 100% merino wool knit
- Style
- activewear, loungewear, performance, technical
- Occasion
- workout, hiking, travel, loungewear
- Gender
- female
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- 250 g/m² 100% merino wool knit
- thermal resistance for extreme cold conditions
- moisture-wicking merino keeps you dry
- ultra comfortable elastic waistband
- flat seams for chafe-free comfort
- thicker and softer 250 merino wool
- versatile base layer for ski slope to fireplace
- Smartwool branded performance legging
- basic thermal legging style
Product Insights
100% merino wool, 250 g knit Best for skiing, lift rides, apres and cold commutes Typical range about -7°C to 7°C under suitable outer layers, with overheating risk in high output Soft merino is less abrasion-resistant than synthetics Machine washable and tumble dryable on low, but air drying preserves fit Premium price buys warmth and softness, but durability and care affect long-term value
Verified claims
- material
- 100% merino wool, 250 g knit
- fit
- Slim next-to-skin fit, generally true to size but long and lean
- length
- Long inseam suits tall wearers and may run long on shorter frames
- crotch rise
- Mid-rise with a gusseted crotch, but the rise can feel short on longer torsos or high-waisted preferences
- stretch
- Limited stretch and some relaxation with wear
- waistband
- Wide elastic high-rise waistband is comfortable but can slip on curvier fits
- construction
- Flatlock seams and a gusseted crotch reduce chafing and hot spots
- warmth
- 250-weight merino traps air for cold-weather warmth
- moisture
- Moves moisture away as vapour and absorbs without feeling damp
- odor
- Merino traps odour until washing, so multi-day wear is practical
- best uses
- Best for skiing, lift rides, apres and cold commutes
- temperature limits
- Typical range about -7°C to 7°C under suitable outer layers, with overheating risk in high output
- softness
- Thick, soft interlock merino is comfortable next to skin
- itch
- Most feel no itch, but sensitive skin may notice a brief prickle
- durability
- Soft merino is less abrasion-resistant than synthetics
- seams & pilling
- Flatlock seams are comfortable, but crotch seams can unravel and the knit can pill
- care
- Machine washable and tumble dryable on low, but air drying preserves fit
- styling
- Matte solid knit with minimal branding, opaque in dark solids
- variants
- Black, Green and Blue in Small through X-Large, all at the same price
- value
- Premium price buys warmth and softness, but durability and care affect long-term value
Product record
- Title
- Thermal Merino 250 Legging
- Brand
- Smartwool
- Price
- 150 CAD
- Availability
- In stock
- Rating
- 4.41 stars, 34 reviews
Buying Guide
0 comparisons · 1 sourceUses
A warm base layer for skiing and winter days
Wear these merino leggings under snow gear for skiing and other winter sports, where reviewers report the warmth and soft fabric keep them comfortable all day. Smartwool describes the thicker 250 merino as thermally resistant for extreme conditions while staying comfortably dry, warm from the ski slope to the chalet fireplace.[1]
Active cold-weather days, with a caveat for lounging
Smartwool says these merino leggings will keep you warm in settings ranging from the ski slope to the chalet fireplace. However, feedback from a reviews analysis indicates they may not feel warm enough when you're standing still, with one reviewer finding them lacking as a cozy fireplace layer for lounging.[1]
Thermal base layer for tall wearers
A merino thermal legging for outdoor wear, with a longer inseam that customers around 6 feet tall reported fits without riding up. Tall and long-legged wearers shared positive experiences with the fit.[1]
Image Analysis
3 images- 01

Product
A model wears a fitted long-sleeve crew top and full-length fitted leggings in solid black; both garments appear smooth-knit with close-fitting seams and minimal visible hardware. A small embroidered logo or mark is visible near the lower left side of the top. Colorful patterned crew socks cover the feet above the ankle.
- Legging silhouetteFull-length, form-fitting black leggings that follow the contour of the legs to the ankle with a narrow ankle opening.
1 region
x 0.18 · y 0.41 · w 0.66 · h 0.56 (high) - Top silhouetteLong-sleeve fitted crew-neck top in the same black knit, extending past the waist to overlap the top of the leggings.
1 region
x 0.23 · y 0.06 · w 0.52 · h 0.36 (high) - Fabric appearanceSmooth, fine-knit fabric with a matte finish and no visible texture pattern at this resolution.
- Hem and seam detailVisible horizontal hem band at the bottom edge of the top; leggings show continuous seam lines along inner and outer leg contours.
1 region
x 0.30 · y 0.32 · w 0.42 · h 0.19 (medium) - Small logo or markSmall embroidered or printed mark located on the lower left side of the top near the hem.
1 region
x 0.57 · y 0.35 · w 0.04 · h 0.04 (medium) - Cuff detailRight sleeve cuff shows three small bright green dots arranged vertically on the outer side of the wrist area.
1 region
x 0.70 · y 0.46 · w 0.07 · h 0.08 (high) - Visible footwear (socks)Pair of mid-calf patterned socks with multicolor abstract shapes covering the feet and lower calves; toes and heels appear solid darker color.
1 region
x 0.25 · y 0.78 · w 0.50 · h 0.20 (high)
Other
Studio shot of a standing model on a neutral gradient background with even soft lighting and soft shadow on the floor. Image shows full body crop from head to feet, minimal props.
- Shot compositionFull-body studio portrait of a standing model centered in frame, slight three-quarter pose with weight on one leg.
- Background and lightingNeutral light gray to darker gray gradient background with soft, even studio lighting and subtle shadow beneath the model.
- Model presenceFemale model visible, showing hands relaxed by the sides and hair over the shoulders; face and hair fully visible.
1 region
x 0.35 · y 0.02 · w 0.30 · h 0.18 (high) - Floor shadowSoft shadow cast by the model visible on the floor area directly beneath and slightly behind the feet.
1 region
x 0.20 · y 0.85 · w 0.60 · h 0.12 (high)
Colors
black· top and leggingsteal· socks - teal shapespurple· socks - purple shapesorange· socks - orange shapesblue· socks - blue shapesvery dark gray· socks - toe and heel- Legging silhouetteFull-length, form-fitting black leggings that follow the contour of the legs to the ankle with a narrow ankle opening.
- 02

Product
Front view of black full-length leggings on a model from waist to ankles, showing a V-shaped front waist seam, flatlock stitching, and a small colored ankle tag.
- Overall silhouetteForm-fitting, full-length leggings shown from mid-waist to feet with a tapered leg profile that fits closely at the ankle.
1 region
x 0.12 · y 0.12 · w 0.76 · h 0.78 (high) - Waistband shapeHigh-rise waistband with a subtle V-shaped front panel seam that creates a shallow inverted-V contour at the center front.
1 region
x 0.25 · y 0.06 · w 0.50 · h 0.20 (high) - Center front seamVisible vertical center-front seam running from the crotch to the V-shaped waist seam, stitched with contrasting slightly lighter thread.
1 region
x 0.40 · y 0.16 · w 0.20 · h 0.15 (high) - Stitching detailFlatlock seam lines visible along the inner thighs and around the waistband with thread slightly lighter than the fabric.
1 region
x 0.18 · y 0.22 · w 0.64 · h 0.50 (high) - Ankle tagSmall vertical fabric tag at the lower outer side of the right leg (viewer left) near the ankle with narrow colored stripes.
1 region
x 0.68 · y 0.86 · w 0.08 · h 0.08 (medium) - Hip embroiderySmall light-colored embroidered mark or emblem on the upper outer left hip (viewer right) near the waistband.Partial
1 region
x 0.60 · y 0.22 · w 0.06 · h 0.08 (medium) - Fabric appearanceMatte, smooth knit fabric with even surface texture and no visible pile or sheen.
1 region
x 0.20 · y 0.30 · w 0.60 · h 0.55 (high)
Other
Studio shot showing a model wearing the leggings against a neutral light gray gradient background; model hands and colorful socks visible; soft even lighting with subtle floor shadow.
- Shot compositionCropped full-body frontal studio shot from mid-torso to feet, centered framing showing both legs symmetrically.
- BackgroundSmooth light gray gradient backdrop with no props or visible environment details.
- Model hands visibleModel's hands appear at the sides of the hips; fingernails are visible and natural colored.
2 regions
x 0.28 · y 0.08 · w 0.18 · h 0.20 (high); x 0.60 · y 0.08 · w 0.20 · h 0.22 (high) - Socks and feetModel wears multicolored patterned socks that extend slightly beyond the leggings at the ankles; socks are not part of the product being described.
2 regions
x 0.14 · y 0.86 · w 0.20 · h 0.12 (high); x 0.66 · y 0.86 · w 0.20 · h 0.12 (high) - Lighting and shadowSoft even studio lighting with a faint shadow on the floor under the feet and subtle highlights on fabric contours.
Colors
black· main fabricyellow· ankle tag stripe - yellowgreen· ankle tag stripe - greenred· ankle tag stripe - red- Overall silhouetteForm-fitting, full-length leggings shown from mid-waist to feet with a tapered leg profile that fits closely at the ankle.
- 03

Product
Rear view of a pair of fitted black leggings on a model, showing a high waistband, visible flatlock stitching across the seat and center seam, and ankle-length tapered legs.
- Rear silhouetteFitted full-length leggings shown from the rear on a standing model, with a continuous single-piece rear panel and tapered legs ending at the ankles.
1 region
x 0.08 · y 0.12 · w 0.84 · h 0.83 (high) - WaistbandWide, high-rise waistband that sits above the natural hip line and appears to be a folded or double-layer band with a smooth finish.
1 region
x 0.18 · y 0.06 · w 0.64 · h 0.13 (high) - Stitching detailVisible flatlock seams in a lighter gray color form a horizontal seam across the top of the seat and a vertical center back seam that continues down between the legs.
2 regions
x 0.18 · y 0.16 · w 0.64 · h 0.10 (high); x 0.46 · y 0.16 · w 0.08 · h 0.60 (high) - Fabric appearanceMatte, smooth knit fabric with close-fitting stretch; surface shows no visible pattern or sheen.
1 region
x 0.20 · y 0.20 · w 0.60 · h 0.70 (high) - Ankle hemNarrow finished hem at each ankle, visible as a small folded edge above the socks.
2 regions
x 0.10 · y 0.82 · w 0.32 · h 0.10 (high); x 0.58 · y 0.82 · w 0.30 · h 0.10 (high)
Other
Studio shot with neutral gray gradient background showing model from mid-back to feet; colorful socks and model hands are visible. Even studio lighting with soft shadows.
- Background and lightingNeutral light gray gradient backdrop with even, soft studio lighting and minimal shadowing behind the model.
- Model visible partsModel's lower back, arms to the wrists, hands, and feet are visible; hands are relaxed at sides with fingers visible on the right.
2 regions
x 0.38 · y 0.00 · w 0.48 · h 0.24 (high); x 0.70 · y 0.46 · w 0.20 · h 0.28 (high) - Props - socksModel is wearing multicolored patterned ankle socks that sit just below the ankle hems of the leggings.
2 regions
x 0.06 · y 0.86 · w 0.32 · h 0.12 (high); x 0.58 · y 0.86 · w 0.32 · h 0.12 (high)
Colors
black· main fabricmedium gray· stitching- Rear silhouetteFitted full-length leggings shown from the rear on a standing model, with a continuous single-piece rear panel and tapered legs ending at the ankles.
Brand PDP Lookup
- Brand
- Smartwool
Women's Intraknit™ Merino Thermal Legging
Variants
12 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 3830531 | Thermal Merino 250 Legging - Black - Small | CA$150.00 | Yes |
| 3830532 | Thermal Merino 250 Legging - Black - Medium | CA$150.00 | Yes |
| 3830533 | Thermal Merino 250 Legging - Black - Large | CA$150.00 | Yes |
| 3830534 | Thermal Merino 250 Legging - Black - X-Large | CA$150.00 | Yes |
| 4619791 | Thermal Merino 250 Legging - Green - Small | CA$150.00 | Yes |
| 4619792 | Thermal Merino 250 Legging - Green - Medium | CA$150.00 | Yes |
| 4619793 | Thermal Merino 250 Legging - Green - Large | CA$150.00 | Yes |
| 4619794 | Thermal Merino 250 Legging - Green - X-Large | CA$150.00 | Yes |
| 4619796 | Thermal Merino 250 Legging - Blue - Small | CA$150.00 | Yes |
| 4619797 | Thermal Merino 250 Legging - Blue - Medium | CA$150.00 | Yes |
| 4619798 | Thermal Merino 250 Legging - Blue - Large | CA$150.00 | Yes |
| 4619799 | Thermal Merino 250 Legging - Blue - X-Large | CA$150.00 | Yes |
Documents & Data
Customer Reviews
34 total34 reviews · out of 5
Appréciation de mes combines
Longueur parfaite pour une grande de 6 pieds!! Et un produit de qualité!
Très bon produit
Très bon produit
Fourche trop courte
Il serait parfait si ce n'était de la fourche qui est trop courte. Je l'ai retourné et ai trouvé le même legging avec une taille haute, beaucoup plus confortable et qui reste en place pendant les sports d'hiver
Comfortable and warm
Comfortable and warm
warm
great base layer
couture fragile à la fourche
Après l'avoir porté 6 fois, lavé 3 fois, j'ai découvert avec déception que la couture commence déjà à se découdre à la fourche, alors que la taille est tout à fait correcte pour moi et que je respecte les instructions de lavage et séchage. Heureusement qu'il est confortable et que je sais faire du raccommodage. . . car je n'ai pas envie de m'en séparer en le retournant à la compagnie.
Bonne longueur
Très confortable, plus long que d'autres modèles que j'ai eu auparavant. La taille s'ajuste bien et tient bien.
Worn - Returned.
This item was a return from someone else. It had piling throughout the bottom area. They just folded it up back in the box and returned it.
Je n’ai jamais trouvé la certification de 250😘 sur le legging, la boîte ou à l’intérieur du vêtement. Est-ce vraiment de la laine mérinos 250 ?
Manque une information pertinente. (250)
Smartwool leggings and top
Excellant Warm Fit well
Legging en laine mérinos
confortable, chaud !
Warm as long as you move, not flexible
It is in the sports section but the fabric doesn't stretch much. It is warm only if you move, if you want it just to be warm by the fireplace this might not be the best option. Overall I like it to walk my dog and it is also flattering, I do not find it flexible nor comfortable enough to do more than walking
Legging merinos
Très chaud, taille juste.
Sous couche incroyable
Je suis incroyablement satisfaite du produit. J’ai acheté en taille M le haut et le bas. 5’8 155lbs
Warm, comfortable and true to size
Nice quality, fits well and provides warmth!
Confort
Confort
unCOMFRTABLE
too itchy
Bien ajusté
Chaud et bien ajusté. Ne conviendrait pas à tous les ventres , tissu est peu extensible
Plus que satisfaite
Je dirais que ce vêtement et tous les autres que j'ai commandés en ligne à date sont de qualité supérieure et je suis très fière de faire partie de la grand famille de Simonsé Toujours fière de porter ce vêtement car il me donne fière allure
Parfair
Parfait pour le ski: doux, chaud, comfortable. Taille reelle
Bonne qualité
Chaud, qualité
Très confortable. Je suis très
Très confortable. Je suis très satisfaite.
Confortable et chaud!
Confortable et chaud!
leggings
soft and warm, also like the style
Draps + leggins
Draps et leggins doux et chauds.
Confortable et durable
Confortable et durable
Excellent achat!
Confortable, chaud.
Confort chaleur et douceur!
Confort chaleur et douceur!
wool leggings
Bought for a gift. I know that she'll like them because they are soft and her favourite colour
CHAUD-BEAU-CONFO
J'adore cet ensemble de sous-vêtements en laine Mérinos. Un incontournable pour traverser l'hiver. Et le motif est super!
Love the high waist.
Great length & warm. Stretches to mold the legs, but the fabric does not thin out but keeps its integrity.
bonne grandeur et belle qualité
bonne grandeur et belle qualité
J’aurais du prendre plus petit.
J’aurais du prendre plus petit. Je vais pouvoir manger beaucoup a Noel
Bon investissement !
Ces leggings sont essentiels à la pratique de sports hivernaux. La qualité est un rendez-vous.