Women's Intraknit Thermal Merino Base Layer Bottom

3D-Knit Athletic Articulation. Seamless Ventilation & Targeted Warmth.

Engineered for intense cold-weather activity, these technical thermal bottoms deliver unrestricted body-mapped mobility, rapid moisture evacuation, and seamless chafe-free comfort during high-exertion backcountry tours and fast-paced resort laps. Utilizing advanced 3D-knitting technology, Smartwool seamlessly integrates targeted mesh ventilation panels in high-heat zones with denser insulated structures over major muscle groups, allowing your body to dump excess heat and sweat without losing core thermal defense. 

• 3D-Knit Intraknit™ Technology: Seamlessly integrates insulation, articulation, and ventilation zones directly into the fabric to eliminate bulk and heavy seams.

• Targeted Mesh Ventilation: Body-mapped mesh panels placed behind knees and lower back allow rapid moisture evacuation during intense exertion.

• Merino & Synthetic Blend: Combines natural Merino thermal regulation and odour resistance with durable polyester and elastane for fast dry times and dynamic shape retention.

• Ergonomic Flex Zones: Rib-knit knee structures and articulated patterning move naturally with your body throughout deep turns and steep ascents.

• Seamless Comfort Waistband: Smooth 3D-knit waistband sits flat against the skin to eliminate pinching or pressure points under pack hip belts or pant waistbands.

• Chafe-Free Construction: Near-seamless design drastically reduces friction points to protect skin during long multi-day tours.

• Low-Profile Layering Fit: Streamlined silhouette slides smoothly under base-layer-friendly ski pants, softshells, or winter tights.