Smartwool Men's Merino150 Base Layer Quater Zip DescriptionWe took our popular Merino 150 Base layer and added a 1/4 zip to it—making it the perfect base layer for warm or cold weather. This top uses our lightest-weight Merino fabric wrapped around a nylon core to increase durability, while still keeping the 100% soft, Merino wool you love next to skin. Side seams help minimize chafing while wearing a pack and offer a body-enhancing fit. Select colorways feature a more responsible plant based dye technique. This base layer is comfortable, powerful, sustainable, and, frankly, do-it-all-able.BenefitsCore SpunMerino fibers wrapped around a nylon core for added durability while still keeping the comfort of Merino next to skinMerino 150This breathable, soft, lightweight fabric offers next-to-skin comfort, moves sweat away from the body, and acts as a versatile performance layer for warmer conditions.Features Slim Fit Our lightest weight Merino jersey fabric uses a nylon core to increase durability while still keeping 100% Merino wool next to skin Offset shoulder and side seams designed to increase comfort and minimize chafing while wearing a backpack Side seams wrap to front for body-enhancing fit Flatlock seam construction designed to minimize chafing 8" (20 cm) center front zip with semi-locking slider Indigo Blue colorway features plant-based dye technique Knit in China: 87% Merino Wool, 13% Nylon. Exclusive of Decoration. CareMachine Wash Warm Gentle Cycle.Do Not BleachDo Not Dry CleanWash With Like Colors