What Our Gearhead(R) Experts Are Saying:"I love the UPF 50 Light Arm 2 Sleeves for sunny rides. They're lightweight, breathable, and the silicone grip keeps them in place all day long."The Castelli UPF 50 Light Arm 2 Sleeves are a must-have for sunny-day rides, offering lightweight coverage and reliable sun protection. Crafted with Solare fabric, these sleeves wick moisture away to keep us cool and dry while providing a UPF 50 rating to shield us from harmful UV rays. The double-sided silicone elastic ensures a secure grip, keeping the sleeves comfortably in place throughout our rides. Perfect for long sunny rides or casual spins, these sleeves keep us protected and focused on the road ahead.