The Castelli Arm Sleeve 2 UPF 50+ Sunsleeve in White offers excellent sun protection and comfort for outdoor activities. Crafted from advanced Solare fabric, it maintains warmth without causing overheating, making it suitable for various weather conditions. With a UPF 50+ rating, it effectively shields your skin from harmful UV rays. The moisture-wicking polyester ensures you stay dry and comfortable. Featuring silicone elastic at the top, these sleeves provide a secure fit, allowing you to concentrate on your performance without distractions.