What Our Gearhead(R) Experts Are Saying:"This base layer is my go-to for cold-weather adventures. The thick Drirelease fabric keeps me warm while wicking moisture, so I never feel clammy, even when pushing hard on the skin track. The half-zip helps regulate temperature, and the thumbholes keep my sleeves in place under layers. Whether I'm skiing, hiking, or just braving the cold, this top is an essential part of my layering system."Born for adventure, the Harebelly Heavy Base Layer Top locks in warmth while keeping breathability at its core. Thicker than the Moss base layer, this top is made for higher peaks, stronger winds, and more exhilarating days in the elements. The Drirelease fabric wicks moisture, dries quickly, and fights odors, so you stay comfortable from first chair to apres. A half-zip design provides easy ventilation, while thumbholes keep sleeves in place and add extra warmth. Whether you're layering up for a backcountry tour or a frigid morning on the slopes, this base layer has you covered.