Now Available! Protect yourself from the sun and heat, with DE SOTO ARM COOLERS™. Yes, ARM COOLERS... contrary to what you wear in the winter to keep your arms warm, this set of sleeves keeps you cooler in hot weather. Skin Cooler ™ is a special moisture-radiating material that actually offers a cooling effect. They are guaranteed to keep your arms cooler in training and in racing than not wearing anything. These sleeves block 75% of UVB rays, which is about as much as any bike jersey you may wear. We recommend you wear sunscreen underneath. Also check out DE SOTO LEG COOLERS Sizing Chart