Giro Chrono Arm Warmers Brrrrr! There is a chill in the air, don't get left out in the cold. Chrono Arm Warmers have a clean design and are made with a perfect blend of nylon thread and polyester that gives them a soft feel while providing superior moisture wicking capabilities. They provide enough flexibility to allow freedom of movement, while remaining comfortably in place. If it warms up, they can be easily removed and stored in your Jacket or Jersey pocket. Features Comfortable wicking performance Full arm coverage Secure Cuff Size Chart Size Small Medium Large Extra Large XX Large Chest (in)33" - 35"36" - 38"39" - 41"42" - 44"45" - 47"Sleeve (in)34"35"36"36. 5"37" | Giro | Chrono Arm Warmers Men's | Size Extra Large/xx Large In Black | Nylon