Pleasant, smooth, pilling knitted fabric.Waterproof woven chest overlay for better durability.The design with 4-Way Stretch technology allows the material to be elasticity in all directions.The material perfectly wicks away sweat and dries very quickly.Anti-odor technology eliminates the growth of odor-causing bacteria.Thumb holes on the sleeves for better holding of the sleeves in place.Practical front 1/2 zipper for easier on/off.Raglan sleeves.Reflective details for running in low light conditions.