Women's Smartwool Classic Thermal Merino Base Layer Pattern Crew footwear-active OS1st's Skin Thin Zones Technology

OS1st's Skin Thin Zones Technology keeps your legs cool and applies varying levels of pressure to six different zones

The rear crash pad promotes earlier ground contact during your stride and combined with a wider base throughout the shoe creates a smoother and more stable transition through your gait cycle

Max stack of high-performance PWRRUNPB foam cushioning

OOFOS took their popular slide style and designed a silhouette with an adjustable velcro upper for a more optimal fit

Women's Smartwool Classic Thermal Merino Base Layer Pattern Crew footwear-active OS1st's Skin Thin Zones TechnologyOur Women's Classic Thermal Merino Base Layer Pattern Crew has been elevated to help bring you more comfort to conquer cold weather days and activities. We've updated this 100% Merino wool fan favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams and a flatlock seam construction helps minimize chafing. Add one of our best base layers for cold weather to your winter