Castelli can only officially rate these at their UPF 50+ rating, but in testing environments they actually blocked 99.8% of damaging UV rays. We used a polyester base that is not only more effective than nylon at blocking UV rays but is also much better at keeping you dry, which means these skins are better in both cooler and warmer conditions. We’ve kept the construction very clean to eliminate seams that can rub, and we used our double-sided silicone elastic to make sure they stay in place. They fold up extremely small, so they’re great to stick in your pockets for your next big mountain day.
• 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: 94g
• 84%POLYESTER 16%ELASTANE