SMARTWOOL MERINO CLASSIC THERMAL 1/4 ZIP

The Smartwool Merino Classic Thermal 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 legendary 100% Merino interlock 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:

• 100% Merino Interlock Fabric Core: Form-engineered with sustainably sourced, pure Merino wool woven in an interlock knit, maximizing the capture of ambient body heat while elevating natural breathability, moisture management, and odor resistance.
• Versatile 1/4 Zip Ventilation Geometry: Fabricated with an extended center-front zipper matrix paired with a protective shoulder-seam configuration, allowing for instantaneous on-the-fly temperature regulation while minimizing under-pack bulk.
• Ergonomic Flatlock Seam Construction: Outfitted with low-profile, smooth-stitched flatlock seams and wrap-around side panels, ensuring the garment moves effortlessly with your natural casting or carving motions while completely eliminating friction chafing.