Smartwool
250 Merino Thermal Legging
The Smartwool 250 Merino Thermal Legging is a full-length, form-fitting base-layer legging made from a 250 g 100% merino wool knit. It is intended for year-round thermal wear in cold conditions, including skiing, camping, and cold-weather city use. Key features include a logo elastic waistband, a front opening, reflective details, flat seams, contoured front and crotch stitching, and narrow fitted ankle cuffs; it is rated 5/5 from 4 reviews.
- Material
- 250 g 100% merino wool knit
- Style
- activewear, performance, technical, layering-piece
- Category
- Apparel & Accessories > Clothing > Activewear
Specifications
Thermal merino wool leggings designed for comfortable year-round layering on the slopes, at the campsite, or during cold days in the city.
250 g 100% merino wool knit, logo elastic waistband, front opening, reflective details, and flat seams for maximum comfort.
- Material
- 250 g 100% merino wool knit
- Style
- activewear, performance, technical, layering-piece
- Occasion
- workout, hiking, travel, everyday
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- 250 g 100% merino wool knit
- thermal legging design
- logo elastic waistband
- front opening
- reflective details
- flat seams for maximum comfort
- designed for year-round wear
- versatile for slopes, campsite, and coldest city days
- Smartwool brand
- available at I.FIV5
Product Insights
250 Merino Thermal Legging 100% merino wool knit with no elastane or nylon 250 g/m² merino is Smartwool's warmest base-layer weight Slim, form-fitting silhouette through hips, thighs and calves Gentle machine wash, low tumble dry, no bleach or dry clean Reviewers praise the warmth and quality for the price
Verified claims
- material
- 100% merino wool knit with no elastane or nylon
- fabric weight / warmth
- 250 g/m² merino is Smartwool's warmest base-layer weight
- fit
- Slim, form-fitting silhouette through hips, thighs and calves
- length / inseam
- Listed 32 in / 81.5 cm inseam, same across sizes
- waist & fly
- Merino-lined elastic logo waistband with a front opening
- seam construction
- Flatlock seams placed to reduce chafing and hot spots
- ankle cuffs
- Fitted ankle cuffs stay put under boots
- comfort
- Soft, non-itch next-to-skin feel
- breathability
- Balances warmth with breathability for cold conditions
- moisture management
- Wicks sweat to the surface and keeps insulating when damp
- odour resistance
- Naturally odour-resistant, so it needs less washing
- stretch & recovery
- Relaxes with wear, then resets after washing
- care
- Gentle machine wash, low tumble dry, no bleach or dry clean
- drying
- Dense 250 merino dries slowly
- durability
- Well-made but more delicate than synthetic base layers
- styling / standalone wear
- Slim matte legging can double as a cool-weather standalone layer
- best uses
- Cold-weather first layer for slopes, campsites and city winters
- vs synthetic base layers
- Choose merino for odour and wet warmth; synthetics dry faster
Product record
- Title
- 250 Merino Thermal Legging
- Brand
- Smartwool
- Price
- 140 CAD
- Availability
- In stock
- Rating
- 5 stars, 4 reviews
Buying Guide
0 comparisons · 5 sourcesUses
Warm first layer for cold Canadian winters
Reviewers describe this legging as warm enough to wear as a first layer in really cold Canadian winters, especially when paired with the matching zip-neck top. Smartwool positions the 250-weight merino fabric as its warmest base layer, designed to insulate without bulk for layering under jackets. The merchant page also suggests it for slopes, campsites, and the coldest city days.[1,4]
Year-Round Wear for Diverse Settings
This comfortable Smartwool 250 Merino Thermal Legging is designed for wear throughout the year. It is suitable for various settings, including use on the slopes, at the campsite, or during the coldest days in the city.[4]
Staying Dry During Cold-Weather Activity
Crafted from 100% Merino wool, this thermal legging utilizes natural sweat management. The fabric naturally wicks moisture away from the skin, keeping the wearer dry and comfortable even when working up a sweat in chilly conditions.[1,2,3]
Staying warm in cold-weather activities
Wear these leggings as a base layer under pants or jackets when heading out in cold weather, whether working up a sweat on winter hikes or everyday outings. Smartwool states the 100% Merino wool construction is designed for temperature regulation, with natural sweat management and odor resistance. The brand describes the Merino 250 weight as its warmest base layer, providing insulation without bulk for layering.[1,2]
Merino base layer that stays fresh through repeated wear
Smartwool's 250 Merino Thermal Legging is made with 100% Merino wool, chosen by the brand for its natural odor-resistance, sweat management, and temperature regulation. That makes it a candidate for situations where you want a base layer you can wear across consecutive days, like multi-day trips, without it developing noticeable odor.[2,3]
A merino base layer for comfort next to skin on cold days outdoors
This 100% merino thermal legging is designed as a base layer worn directly against the skin, with flat seams and a merino-lined elastic waistband intended to keep chafing and discomfort down. The merchant describes it as comfortable to wear year-round, whether on the slopes, at the campsite, or on the coldest days in the city. Comfort-focused features like the flatlock seams and merino next to skin are manufacturer design claims rather than reported wearer results.[2,3,4]
Wearing the Merino 250 legging on its own
Smartwool says Merino 250 pieces are designed primarily as base layers but are stylish and comfortable enough to wear on their own, with the fabric's softness and natural stretch suited to cool-weather activities or casual outings. That makes these thermal leggings an option beyond layering, like pairing with a top for a casual cool-weather look.[1]
Wash to bring back the snug fit
One reviewer found that a trip through the washer was all these merino thermal leggings needed to reset the fit to like-new standards, restoring the snug feel after wear. He even found himself looking forward to laundry day as a way to tighten the fit back up. Washing also doubles as a way to freshen them up after trail days.[5]
Multi-day camp wear with fit that can loosen over time
One reviewer found the 250 Merino Thermal Legging bottoms kept him warm across several evenings at camp, though he noticed stretching with use. After 2 to 3 evenings of wear, he reported slack in the seat, waist, and thighs, and said the loosened fit would have made hiking in them difficult. He notes the stretching may cause a loose fit until laundry day.[5]
Image Analysis
2 images- 01
Product
Front view of a pair of black full-length thermal leggings worn on a model; visible front seam lines, contoured stitching at crotch and inner thighs, and a narrow fitted ankle cuff.
- Overall silhouetteFull-length, form-fitting leggings shown on a model from waist to ankles with a snug fit through hips, thighs and calves.
1 region
x 0.08 · y 0.10 · w 0.84 · h 0.82 (high) - Waistband and riseMedium-rise elastic waistband sits at the natural waist area; front center shows a contoured stitched fly-shaped panel continuing into the crotch seam.
1 region
x 0.28 · y 0.06 · w 0.44 · h 0.18 (high) - Stitching and seam detailVisible flatlock-style seams run along the inner thighs and down the front of each leg; additional vertical seam detail on the inner calf above the ankle.
1 region
x 0.20 · y 0.20 · w 0.60 · h 0.62 (high) - Ankle cuffNarrow, fitted ankle cuff that gathers slightly over the top of the socks, with subtle horizontal ribbing where fabric compresses.
1 region
x 0.20 · y 0.76 · w 0.60 · h 0.18 (high) - Surface finishMatte knit fabric with a smooth, uniform texture and no visible surface shine.
- Small hip markSmall, light-colored embroidered or printed icon located on the right front hip area near the waistband; appears as a tiny abstract figure.Partial
1 region
x 0.57 · y 0.13 · w 0.04 · h 0.06 (medium)
Other
Studio product shot showing a model wearing the leggings against a plain light gray background; shot crops the model at mid-torso and includes hands and socks. Even, diffuse lighting with soft shadows under the feet.
- Shot compositionStudio frontal crop showing model from mid-torso to feet, centered in frame with both legs visible and feet slightly apart.
- Background and lightingUniform light gray background with even, soft studio lighting and faint shadow beneath the model's feet.
- Visible props and clothing not part of productModel is wearing a long-sleeve top and patterned dark socks; hands are visible at sides and are not part of the product being described.
2 regions
x 0.00 · y 0.00 · w 1.00 · h 0.28 (high); x 0.28 · y 0.84 · w 0.45 · h 0.16 (high) - Image qualitySharp focus on the garment with natural skin tones and no visible motion blur; colors appear true to studio lighting.
Colors
deep black· main body- Overall silhouetteFull-length, form-fitting leggings shown on a model from waist to ankles with a snug fit through hips, thighs and calves.
- 02
Product
Rear view of a person wearing black fitted thermal leggings; visible elastic waistband with printed brand text, flatlock seams, and gathered lower leg above the ankle.
- SilhouetteTight-fitting full-length legging shown from the rear on a model, following the contour of hips, thighs and calves to the ankles.
1 region
x 0.09 · y 0.11 · w 0.82 · h 0.78 (high) - WaistbandElastic waistband sits at the natural waist with contrasting printed text across the rear; waistband appears slightly thicker than the leg fabric.
1 region
x 0.25 · y 0.06 · w 0.50 · h 0.12 (high) - Printed text on waistband“Smartwool”
1 region
x 0.28 · y 0.07 · w 0.43 · h 0.07 (high) - Seam detailingVertical flatlock seam runs down the center of each leg rear and curved seam across the upper rear; seams are slightly lighter in tone than the main fabric.
2 regions
x 0.36 · y 0.12 · w 0.28 · h 0.63 (high); x 0.12 · y 0.12 · w 0.35 · h 0.50 (medium) - Lower-leg gatherFabric is slightly ruched/gathered at the lower calf above the ankle on both legs, creating stacked folds.
2 regions
x 0.14 · y 0.75 · w 0.23 · h 0.17 (high); x 0.63 · y 0.74 · w 0.21 · h 0.18 (high) - Fabric appearanceSmooth, knit thermal fabric with a matte finish and fine texture visible at close range.
- Visible model garmentsPortion of a long-sleeve top is visible above the waistband and the model is wearing mid-calf socks; these are not part of the legging but are visible in the image.
2 regions
x 0.20 · y 0.02 · w 0.60 · h 0.12 (high); x 0.12 · y 0.82 · w 0.76 · h 0.17 (high)
Other
Studio product shot with neutral light gray background, even soft lighting, and the model centered and cropped at mid-forearm and feet.
- Background and stagingUniform light gray background with a subtle shadow beneath the model; no props or packaging present.
- Shot compositionRear-facing full-length crop showing the model from mid-forearm to feet, centered vertically and horizontally.
1 region
x 0.06 · y 0.02 · w 0.88 · h 0.96 (high) - Lighting and shadowSoft, diffuse lighting with minimal harsh shadows; faint shadow cast below the feet toward the front.
Colors
black· main fabricwhite· waistband textdark gray· seam stitching- SilhouetteTight-fitting full-length legging shown from the rear on a model, following the contour of hips, thighs and calves to the ankles.
Brand PDP Lookup
- Brand
- Smartwool
Women's Intraknit™ Merino Thermal Legging
Variants
8 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4099607 | 250 Merino Thermal Legging - Black - Small | CA$140.00 | Yes |
| 3830170 | 250 Merino Thermal Legging - Black - Medium | CA$140.00 | Yes |
| 3830171 | 250 Merino Thermal Legging - Black - Large | CA$140.00 | Yes |
| 3830172 | 250 Merino Thermal Legging - Black - X-Large | CA$140.00 | Yes |
| 4621513 | 250 Merino Thermal Legging - Indigo/dark Blue - Small | CA$140.00 | Yes |
| 4621514 | 250 Merino Thermal Legging - Indigo/dark Blue - Medium | CA$140.00 | Yes |
| 4621515 | 250 Merino Thermal Legging - Indigo/dark Blue - Large | CA$140.00 | Yes |
| 4621516 | 250 Merino Thermal Legging - Indigo/dark Blue - X-Large | CA$140.00 | Yes |
Documents & Data
Customer Reviews
4 total4 reviews · out of 5
Winter Essential
The 250 merino thermal leggings are just as impressive as the matching top; soft, stretchy, and warm. They’re perfect as a first layer during those really cold Canadian winters, especially when paired with the matching zip-neck top. Also a great choice for layering for your ski trip or any outdoor activity!
Legging mérinos
Chaud, de bonne qualité, bon rapport qualité prix.
le legging Merino Smartwool
Fait bien et chaud . . . Très bon rapport qualité prix . . . Une marque fiable
Vraiment parfait
Très bon achat