The Men's Ortles Cubic Polarlite Long Sleeve Tee is a lightweight & breathable baselayer for mountaineering, ski mountaineering & other mountain activities. made from polarlite which quickly pulls moisture away from the body, it’s comfortable when worn next-to-skin thanks to its soft construction & provides high warmth from minimal weight. Salewa's athletic fit & flat lock seams keep things very comfortable. The four-way stretch fabric & ergonomically shaped sleeves give a great fit & full freedom of movement whether worn as part of a layering system or on its own. & you’ll appreciate the effective odour control on longer trips.