CLSL TM-S17-BLKZ_Large Tesla Men's Cool Dry Compression Baselayer Shorts Pants Capri Tights S17 10% spandex We strongly recommend ordering ONE size up what you normally wear. Coolgear Shirts & Pants are designed for all seasons (not for Warmth) 87% polyester-13% spandex. Excellent elasticity with enhanced range of motion. Perfect option during various indoor activities and outdoor excursion. Moisture Sensing/Quick time Dry/TWO-WAY Air Circulation.