Smartwool Intraknit Thermal Merino Base Layer 1/4 Zip – Women's Size:S DNA Loft midsole delivers soft

DNA Loft midsole delivers soft

This edition of the Boston wraps your feet in plush genuine shearling

Stability Plane technology guides your foot through a natural gait cycle without locking you into an unnatural motion path

Built-in shorts deliver real coverage so you can hike

Smartwool Intraknit Thermal Merino Base Layer 1/4 Zip – Women's Size:S DNA Loft midsole delivers softFor cold weather runs, ski days, and winter hiking, the Intraknit Thermal Merino 1 4 Zip is our top pick for women who need a base layer that works as hard as they do. Smartwool's Intraknit construction places insulation and ventilation exactly where your body needs them, so you stay warm without overheating. The 1 4 zip lets you dump heat fast when the trail heats up. Intraknit technology creates distinct insulation and ventilation zones across the