The Smartwool Women's Merino 150 Baselayer is a top-rated hiking bodysuit top that offers excellent warmth and comfort. It is made from a blend of merino wool and synthetic fibers, providing superior moisture-wicking and temperature regulation properties. The shirt has a slim fit and features flatlock seams for reduced chafing and irritation. It also has UPF 30 sun protection, shielding your skin from harmful UV rays. The shirt's merino wool construction makes it naturally odor-resistant, allowing you to stay fresh even during intense outdoor activities. Whether you're hiking in cold weather or layering for added warmth, this top-rated bodysuit top is a reliable choice.