SMARTWOOL INTRAKNIT ALPINE 1/4 ZIP

The Smartwool Intraknit™ Thermal Merino 1/4 Zip is a premium, heavy-duty performance base layer engineered to provide winter athletes and alpine explorers with rapid thermal adaptation and ultimate environment protection in sub-zero conditions. Moving away from standard, uncalibrated long-underwear tops that bunch under outerwear, trap cold sweat against the skin, or restrict your range of motion during technical maneuvers, this advanced 3D-knit system organizes your microclimate in a sleek, body-hugging profile. Built specifically for demanding ski descents, backcountry snowboarding lines, and high-intensity cold-weather mountaineering, it delivers the ultimate combination of seam-free durability, shift-safe security, and streamlined convenience to keep your performance cadence primed for action.

Key Features:

• Revolutionary 3D-Knit Merino Core: Form-engineered with an advanced 3D mapping process that seamlessly blends responsibly sourced Merino wool with durable performance yarns, providing targeted warmth while cutting down on overall garment weight.
• Gender-Specific Ventilation Geometry: Fabricated with integrated mesh structures knit directly into high-heat zones, maximizing continuous airflow and moisture wicking where your body sweats the most without sacrificing wind protection on exposed areas.
• Articulated Slim-Fit Flex Construction: Outfitted with structural ribbed panels and specialized flex zones that conform directly to your body's shape, ensuring the top moves effortlessly with your natural casting or carving motions while remaining perfectly flat under heavy outerwear layers or backpack straps.