KingTECH Running Sports GYM Armband Case Cover for Sport Armband for iPhone 4S, iPhone 4, iPhone 3G 3GS ipod touch4 Fits iPhone 4/4S and iPhone 3G/3GS when no protective case is used Made of high quality neoprene with multiple layers padding Quite comfortable to wear, Lightweight and Durable. Armband is compatible with upper arm circumference: 31  39 cm.