The Sestriere underwear is a lightweight second skin layer for your outdoor adventures. Worn under baggy shorts the breathable, stretchy fabric helps to maintain a free range of motion.88% Nylon, 2% Polyester, 10% Spandex,Seamless Garment Technology,Lightweight breathable fabric,Mesh weave inlays increase ventilation,4-way stretch.B9 PadAntibacterial fabric,High density foam,Moisture transference ,Maximum comfort.