Lightweight, Breathable, UPF 50 Arm and Hand Protection: Our top-selling ActiveIce Sun Sleeves offer maximum sun protection, covering the entire hand and featuring thumb holes and a bicep grip for secure fit. Crafted with a bluesign approved polyester blend, the ActiveIce line adjusts to your body temperature for quick cooling. Moisture-wicking and UPF 50 sun protection make it ideal for hot, sweaty conditions. Engineered with our most effective cooling materials, these Sun Sleeves keep arms and hands cool and protected during long days outdoors.