RIGORER Men's Camouflage Compression Short Sleeve Shirt Cool Dry Running Baselayer Tee 84% Polyester/16% Spandex.Breathable, soft and moisture-wicking fabric keep you dry and comfortable Stretch-mesh underarm panels deliver strategic ventilation,stretchy and durable material allows greater mobility and improves your performance during training Flat Lock Seams Stitching allows flexible mobility without chafing or skin irritation Polyester fabrics disperse the sweat quickly, stimulate air flow and keep the wearer cool and dry Ergonomic compression fit for enhanced range of motion,this compression shirts are very suitable for running, gym, riding, basketball, soccer, jogging or any other outdoor and indoor activities.