Apple iPhone 4S Neoprene Exercise Armband (PURPLE) Double stitched perfect-fit neoprene exercise armband!!! Equipped with an extra rear interior plastic layer making it the most sweat/water resistant armband on the market!!! Built in comfort key pocket, allows storage of everything you need in one place!!! Armband is built to withstand any amount of physical activity!!! Perfect for any exercise: running, weight lifting, even jump roping and bike ridding...ect!!!