I've been using these Castelli arm sleeves for years. I am happy to minimize the amount of sunscreen I use on my body while maintaining good UVA protection. In addition, I am able to use these even in the hottest weather as the sweat on them wicks off at speed and has a decent cooling effect. The only think about them is the price and the fit - it's tough getting the upper arm attachment flat and comfortable at tiimes and the wrist area can sometimes be loose.
Use as light weight arm warmers and sun protection. Bright white color. Fits better around upper arm but is somewhat too loose on the lower portion. Lacks elasticity to conform snuggly. The fabric doesn't feel quite as good as my other pair of white arm coolers.
