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 fabrics subtle grid pattern sits lightly and comfortably on the skin the smooth outer face glides easily in any layering system. Highly breathable for high exertion and warm conditions, the fabric is bluesign approved, 100% recycled polyester with 35 UPF sun protection and is treated with Polygiene permanent odor control. Features include a brushed elastic waistband for next to skin comfort, a gusseted crotch for mobility, flatlock seams to minimize chafing and a fully functional fly.