Craft Sportswear Women's Performance Hi-Visibility Glow Bike Cycling Full Zip Short Sleeve Jersey: protective/riding/compression/cooling 94% Polyester, 6% Elastane Imported Six-channel fiber construction pulls perspiration vapor off the body to keep you cool Ergonomic design for perfect riding-position fit Soft, elastic fabric for optimal fit and comfort Mesh Superlight at hot spots for active cooling and moisture transport Soft, ergonomic sleeve endings Craft is the official apparel and footwear sponsor of Spartan Race Lightweight, micro polyester fabric with a 6-channel fiber construction that effectively pulls perspiration vapor off the body to keep you cool Ergonomic design for a perfect riding-position fit Soft, elastic fabrics for optimal fit and comfort