Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
Smartwool Men's Intraknit Thermal Merino Base Layer Colorblock Crew
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Men's Intraknit Thermal Merino Base Layer Colorblock Crew

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Men's Intraknit™ Thermal Merino Base Layer Colorblock Crew

Made with our innovative Intraknit™ technology, the Men’s Intraknit™ Thermal Merino Base Layer Colorblock Crew is designed with colorblock patterning for a distinctive look. It’s 3D-knit to enhance performance, and it offers mesh zones for better breathability in all the right places. Plus, this crew is built so that it fits as though it’s custom-made just for you. With enhanced durability features such as ribbed elbows, this shirt will last for a long time to come.

Intraknit™ 3D-Knit Thermal Construction
Intraknit™ technology: insulation, articulation, and ventilation are seamlessly integrated to help with movement and comfort. Rather than sewing separate panels onto a base fabric, the Intraknit™ knit builds the insulation, breathability, and stretch zones directly into the fabric itself. The result is a single piece of knit that warms where the body is static, breathes where the body works, and stretches where the body bends — with fewer seams and fewer cold spots than a sewn-together equivalent.
Colorblock Patterning — Distinctive Look
Designed with colorblock patterning for a distinctive look — the visual differentiator that separates this Thermal crew from the standard Intraknit Thermal base layer. The colorblock knit uses the Intraknit™ 3D construction to integrate contrasting color zones into the fabric itself rather than printing or piecing them on, so the pattern performs and wears like the rest of the garment. A base layer with the look of a stand-alone piece when the jacket comes off in the hut or on the chairlift.
Merino Sport Yarn Blend — Heavyweight
53% Merino Wool, 44% Polyester, 3% Elastane. Merino Sport yarn wraps soft Merino fiber around a durable polyester core — the Merino delivers the natural temperature regulation and odor resistance; the polyester core adds the abrasion toughness and faster dry time a deep-cold-weight base layer needs. 3% elastane (higher than the standard 2%) gives the 3D-knit articulation extra stretch recovery across the shoulder and elbow.
Heavyweight — Built For Deep Cold
Heavyweight positions this crew as the right choice for sub-freezing days, lift-served skiing, ice climbing, mountaineering, and long static belay sessions — not shoulder-season high-output activity. Warmer than the All-Season Intraknit crew, heavier than the midweight Classic Thermal 250g/m². The right weight when a midweight would soak through before lunch on a -10° lift ride.
Seamlessly Knit Mesh Ventilation
Mesh zones for better breathability in all the right places — ventilation is built into the knit itself rather than added as sewn-on mesh patches. The mesh is mapped to where the body builds heat during high-intensity activity, dumps heat where it’s needed, and breaks thermal continuity only at those specific zones. Heavyweight warmth with high-output breathability in a single fabric, no glued-in ventilation strips, no bulky seams that cold-spot or wear through.
3D Mapping For Near-Custom Fit & Movement
3D-knit to enhance performance — 3D mapping tailors the fabric’s stretch and structure to the body’s natural movement. Built so that it fits as though it’s custom-made just for you. The knit relaxes where the body bends (shoulder, elbow) and compresses where the body is straight (chest, side). The result is a base layer that moves with the body rather than fighting it; fewer hot spots at the articulation points, less bunching under outer layers.
Ribbed Elbows — Enhanced Durability
With enhanced durability features such as ribbed elbows, this shirt will last for a long time to come. The ribbed elbows are a knit-in reinforcement at the highest-friction point on the arm — a standard base layer crew wears through at the inner elbow first (the spot that drags against a pack strap, a harness, or a hard-shell sleeve during repeated movement). The ribbed knit adds density where the wear happens, extending the lifespan past a standard crew’s elbow-hole failure.
Men’s-Specific Slim Fit
Our slim fit is intended to follow the contours of the body without excess bulk. Engineered in men’s proportions — broader through the shoulder and chest, with a sleeve length that reaches the wrist without bunching. Layers cleanly under a hardshell, mid-layer, or ski jacket without the cold spots a boxy unisex fit would create.
Multi-Activity Versatility
Built for the wide range of deep-cold activities where warmth is the priority but high-output movement still demands breathability — alpine touring, ice climbing, lift-served skiing, mountaineering, winter trail running, and backcountry hut trips. The Merino Sport yarn blend handles the cold-to-warm swings without the clammy chill a pure synthetic would develop when you stop moving.
Technology
Intraknit™ 3D-Knit (Insulation, Articulation, Ventilation); Merino Sport Yarn; Ribbed Elbow Reinforcement

General

Product
Men’s Intraknit™ Thermal Merino Base Layer Colorblock Crew
Fit
Slim fit (intended to follow the contours of the body)
Category
Thermal Base Layer Crew (Heavyweight, 3D-knit, Colorblock)
End Use
Deep-Cold Activity, Winter Layering
Technology
Intraknit™ 3D-knit (Insulation, Articulation, Ventilation zones); Merino Sport yarn; Ribbed Elbow Reinforcement
Gender
Men’s
Available Sizes
S, M, L, XL, XXL

Materials & Construction

Fabric Weight
Heavyweight (Thermal — built for deep cold)
Fabric Composition
53% Merino Wool, 44% Polyester, 3% Elastane. Exclusive of Decoration.
Knit Construction
3D-knit Intraknit™ — body-mapped insulation, articulation, seamlessly knit mesh ventilation, and colorblock patterning
Durability Features
Ribbed elbows (reinforced knit at the high-friction inner-elbow zone)
Country of Origin
Made in India
Washing
Machine wash cold on a gentle cycle. Wash with like colors — the Merino Sport blend benefits from isolated washing to protect the fabric’s thermal and moisture-management properties and the colorblock pattern’s color integrity. Cold water protects the elastane recovery and the Merino Sport yarn’s polyester core. Use a mild, technical wash; avoid fabric softeners.
Drying
Dry flat. Do not tumble dry. The heavyweight Intraknit 3D-knit retains its body-mapped ventilation and insulation structure best when laid flat to dry — tumble heat can flatten the knit’s articulation zones and shrink the Merino fibers. Lay flat on a clean towel away from direct heat.
Bleach & Iron
Do not bleach. Cool iron as needed — do not iron decorations. Bleach breaks down Merino wool fibers and degrades the elastane. Iron only on low heat and only on the non-decorated fabric areas; high heat can scorch the Intraknit™ 3D-knit structure and flatten the body-mapped ventilation zones and the ribbed elbows.
Dry Cleaning
Do not dry clean. The harsh solvents used in commercial dry cleaning strip the natural lanolin from Merino and degrade the Merino Sport yarn’s polyester core — both of which are core to the fabric’s thermal and moisture performance.
Storage
Store folded in a dry, breathable space. Merino Sport yarn resists odor naturally — the same crew covers multiple wear days between washes, which extends the fabric’s lifespan. Folded storage preserves the 3D-knit structure and the colorblock pattern; hanging for long periods can stretch the elastane out of the articulation zones and distort the ribbed elbows.

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 4-7 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 3-10 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Merino Layer System — SW016453

Built For

Alpine Touring
10° – 30°F
Cold skin-track ascents and sub-freezing descents where a midweight crew would soak through on the climb and chill on the way down. The heavyweight Intraknit™ insulation retains warmth under a shell when static, and the body-mapped ventilation dumps heat on the skin-track without breaking thermal continuity at the core. The colorblock pattern stays looking sharp across a full hut-to-hut tour.
Ice Climbing
0° – 25°F
Long static belay sessions in bitter cold where a lighter crew would lose core warmth, with high-output swinging bursts where breathability matters. The Merino Sport yarn’s polyester core keeps the fabric lofted when wet from ice and breath, and the heavyweight knit holds the heat through the slow minutes between pitches. Ribbed elbows take the abrasion of pack-strap and harness wear on long approaches.
Lift-Served Skiing
15° – 35°F
Full chairlift days at the resort when the wind chill is the limiting factor. The heavyweight 3D-knit insulates under a shell on the chair and on cold lift rides; body-mapped ventilation across the upper back and under the arms dumps heat on the groomers without breaking core warmth. The colorblock patterning looks the part in the lift line and the lodge.
Winter Mountaineering
Sub-Freezing
Multi-pitch winter routes and hut-to-hut trips where the temperature stays well below freezing all day. Heavyweight 3D-knit insulation layers cleanly under a hardshell and a belay parka; the ribbed elbows take the abrasion of repeated pack-strap contact on long approaches and rough snow. The Merino Sport yarn’s abrasion resistance stands up to alpine-grade wear.
Layer Over It

Pair It With A Bottom

The Intraknit Thermal Colorblock Crew is the upper half of a complete deep-cold Intraknit base layer system. Pair it with the matching Men’s Intraknit™ Thermal Bottom for a full-body heavyweight 3D-knit system, or mix with a Smartloft bottom for the warmest possible foundation.

  • Men’s Intraknit™ Thermal Bottom matched heavyweight system
  • Men’s Smartloft™ bottom insulated foundation option
  • Men’s Classic Thermal Merino bottom warmer-on-the-legs option
  • Men’s Hike PhD™ crew sock full-day cold-weather rotation pair
Layer Over It

Top It With A Mid & Shell

For full weather protection on the coldest days, layer a mid-insulation piece and a hardshell over the Intraknit Thermal Colorblock Crew. The slim base-layer fit doesn’t bunch under a puffy or a shell; the heavyweight 3D-knit holds warmth against a belay parka’s compressible insulation. The colorblock patterning stays visible at the neckline when the shell opens.

  • Smartloft™ vest or jacket core warmth on static belays
  • Hardshell ski jacket wind and waterproof outer layer
  • Men’s Hike Light jacket active cold-weather mid-layer
  • Belay parka static-insulation outer for sub-zero stops

Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.


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