Most cycling jerseys are made out of a material called lycra, which is just a fancy brand-name version of spandex. Our jerseys utilize several different types of lycra in different areas of the jersey. The front and back of the jersey are made out of a grid lycra which is very form-fitting and will wick away moisture to keep you cool. The sides and underarm areas use a mesh lycra for even better breathability and moisture-wicking. The sleeves use a textured lycra to help keep them in place and comfortable during rides. The arm and waist grippers are silicone-injected lycra to keep the jersey from moving around too much while you are on the bike.