The lightest-weight, fastest-drying and best-wicking base layer. Patagonia Capilene Lightweight Crew Top is perfect for moisture-management when layering in cold conditions. This Crew Top layers nicely under any outer layer for either hiking, skiing, snowshoeing or cross-country skiing in cold weather. Featuring Polygiene(R) odor control for a fresh, odor-free layer even when worn multiple days without laundering, Features: Capilene(R) Lightweight has a smooth face for easy layering Fabric s open grid pattern next-to-skin provides excellent breathability; moisture wicking and dry time Self-fabric crew at collar with internal neck tape for comfort; locker loop for hang-drying Offset shoulder seams eliminate chafing under pack straps Full underarm gusset for range of motion and chafe-free comfort Elastic thumb loops for secure hand coverage Flatlock seams to minimize chafing; drop tail for more coverage Weight: 99 g (3.5 oz) Slim Fit Materials: 2.3-oz (80 g) 100% recycled polyester double knit with 35-UPF sun protection and Polygiene(R) permanent odor control.