2011 3t Black Castelli Men's Short Sleeve Bike Clothes Strap Suit,perfect Perspiration Breathable Strap Cycling Jersey Set COOLMAX: Quick-Dry function and make you feel more comfortable Lightweight material with moisture wicking technology Material: Jacket: 100% Polyester; Shorts: 90% Polyester, 10% Spandex, COOLMAX Anti-Virus Pad High-performance moisture permeability sweat in bringing good feelings Please choose size on the basis of size chart