Smartwool Classic Thermal Merino Base Layer Bottom – Women's color-pink Lightweight textile upper balances breathability

Lightweight textile upper balances breathability with a clean

loose gravel

the Casia is our pick for women who want serious warmth without bulk

while the 4 Degree elite fit system keeps the sock locked in place with zero bunching

Low-bulk fit layers cleanly under a pack or shell

Smartwool Classic Thermal Merino Base Layer Bottom – Women's color-pink Lightweight textile upper balances breathabilityBuilt for cold weather output on the trail or in camp, this merino base layer bottom is our pick for plus size athletes who need warmth that actually moves with them. Thermal interlock merino wool regulates temperature and wicks moisture without synthetic cling, so you stay dry whether you're pushing hard or standing still. Flatlock seams and a plus specific cut mean no bunching, no chafing, and real coverage where it matters. Thermal weight merino