Smartwool Intraknit Thermal Merino Base Layer Crew – Women's Color:Pacific Blue Nightfall Blue with a roomy toe area

with a roomy toe area and deep heel cup for a secure

Hybrid gym-to-swim design cuts the need for a wardrobe change — one short handles the whole day

Designed to protect your brain from rotational (the most common) impacts

and base camp setups

Smartwool Intraknit Thermal Merino Base Layer Crew – Women's Color:Pacific Blue Nightfall Blue with a roomy toe areaWhen cold temps meet high output on the trail or mountain, this is the base layer we reach for first. Smartwool's Intraknit construction places merino insulation and ventilation zones exactly where your body needs them so you stay warm without overheating. It works equally well under a shell or as a standalone piece on milder days. Intraknit body mapped zones deliver targeted warmth in core areas and active ventilation where you run hot no guesswork,