The sun can be relentless. Even on a chilly fall day, if you're out in the sun, care should be taken to guard the skin form its harmful effects. The Castelli UP 50+ Arm Skins, aim to do just that. Made of Solare fabric they'll keep the brisk air off the skin, yet breathe to combat overheating and also provide a 50+ layer of UPF protection. FEATURES Solare fabric keeps the chill off without causing overheating UPF 50+ protection Polyester based for excellent moisture management Double-side silicone elastic at top for excellent grip Weight: 66g | Castelli Upf 50+ Light Arm Sleeves Men's Size Extra Large in Black