The Smartwool Women's Merino 250 Base Layer is a premium bodysuit top that combines comfort, warmth, and style. Made from 100% Merino wool, this top offers excellent insulation and moisture-wicking properties. The natural fibers of Merino wool regulate body temperature, keeping you warm in cold weather and cool in warm weather. The flatlock seams prevent chafing and irritation, while the UPF 50+ rating provides protection against harmful UV rays. Whether you're hiking, skiing, or engaging in other outdoor activities, this top will keep you comfortable and stylish throughout your adventures.