The Giro Chrono UV Arm Sleeves offer comfortable coverage for riders who ride sun and petals blazing. These sleeves are made with WikPro fabric which provides excellent moisture wicking and keeps you dry and cool, while offering UPF 50+ protection. They have a comfortable amount of stretch so you can move freely and won't shift out of place. The Giro Chrono UV Arm Sleeves are an essential bike apparel item that will be a long-lasting staple to your riding collection.