Capilene® Lightweight Bottoms weigh next to nothing in your pack but when the sun drops behind the South Rim and the desert air cools as though it’s refrigerated, they provide much-needed warmth. Ultralightweight and easily packable, this is the baselayer to grab for warm-weather backpacking when temperatures fluctuate between night and day, sunshine and clouds. Capilene® Lightweight is our lightest-weight, fastest-drying and best-wicking baselayer. The fabric’s subtle grid pattern sits lightly and comfortably on the skin, while the smooth outer face glides easily in any layering system. Highly breathable for high-exertion and warm conditions, the fabric is 100% recycled polyester treated with Polygiene® permanent odor control. Features include a brushed elastic waistband for next-to-skin comfort, a gusseted crotch for mobility, flatlock seams that minimize chafing and a fully functional fly. Fair Trade Certified™ sewing.