Wahoo Armband for iPhone Thick neoprene band cinch snugly to your arm to minimize bouncing and chaffing issues Works with iPhone 4S, 4, 3GS, 3G; Does not work with iPhone 5 Weather and Sweat-Proof Side headphone port keeps sweat/rain from getting in your iPhone (headphones not included) Fits up to 15 inch arm (381 mm)