Smartwool Intraknit Thermal Merino Base Layer Crew – Women's Color:Pacific Blue Nightfall Blue dry conditions or as a

dry conditions or as a liner under a waterproof shell when temps and weather get serious

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

UPF 50+ rated brim with dark underside fabric cuts glare from water

this is our pick for women who want merino comfort without sacrificing support

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

Smartwool Intraknit Thermal Merino Base Layer Crew – Women's Color:Pacific Blue Nightfall Blue dry conditions or as aWhen 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,