Craft Sportswear Men's Active Extreme Long Sleeve Base Layer Athletic Training Fitness Shirt: cooling/sport/bike/ski/run/sun/protection/top 100% Polyester Imported Bodymapped wind protection at shoulders and front of torso Lightweight, elastic Gore Windstopper fabric Protects your body in fair and windy conditions Provides comfort where you need it Seamless torso and Ergonomic fit