Built to be worn for weeks on alpine routes, washed in glacial streams and dried in the slipstream of a bus window, our soft and compressible Capilene 3 Midweight Zip-Neck provides excellent insulation and next-to-skin comfort. The most versatile of our performance baselayers, it stretches, dries quickly and resists wear. The fabric is brushed on the inside for warmth and has a smooth knit face that glides easily between layers. Details include a low-bulk zip-neck for easy venting, thumb loops for secure hand coverage and offset shoulder seams to eliminate pack-strap chafe. Made of a 5.4-oz Polartec Power Dry 100% polyester double knit, with Polygiene permanent odor control. Fabric is bluesign approved.