The Hot Chillys Men's Micro-Elite Chamois 8K Midweight Tights are made with a blend of soft MTF (Moisture Transfer Fibers) micro polyester yarns, Bio Silver (silver based) non-abrasive polyester and spandex for a body fit that stretches and moves with you. The outside of the fabric has a silky feel, while the inside is lightly sanded for added softness and that 'chamois' feel. The smooth outside surface makes garments slide over with ease and makes this a best seller.Import.