... Breathable,breathable,sunproof ,Anti-UL Product descriptions:Cycling arm sleeve arm protector GERMINATIONFabric:Combination of Polyester and spandex,mesh clothColor ... choise for early autumn or late summer ,when espeically some a little cold morning ,it keeps your arm warm,and ... and comfortable wearing without feeling constrictions. Customs designs arm sleeves are acceptable, pls feel free to inquiy ...