Made out of 100 polyester in the arms collar and shoulders to create durability and abrasion resistance Offers VaporCore technology in the torso area fabric which can help delay perspiration by speeding up the evaporation process to stay dry all day Features an athletic form fitting design that makes it ideal for wearing under other clothing Provides protection from UVA and UVB rays to fight the suns rays and keep colors bright Can be worn on its own or as a layer with AeroShell for increase performance