CBC Men's Compression Tight Shirt Base layer Running Shirt Black/Blue Polyester 86%, elastane14%.light,quickly dry, recycling, reduce skin friction and keep you comfortable and dry Faster warm-up, heat retention and quick dry, make you warm and dry in the winter and cool in the summer Fit and comfortable enough to help you move fast, improved performance and reduces muscle vibration, reduce overuse injuries Great for cycling, running, training, competing, skiing, snowboarding and all weather sports and activities