Running and Exercise Workout Armband Case for iPod Nano 8th and 7th Generation Devices with Adjustable Sport Band, Reflective Border, Touch Screen Protection and Key Holder (8 G 7 G Black) COMPATIBILITY: Compatible with the iPod Nano 8th Generation & 7th Generation Devices USE: Full touch-screen control, easy access to ear phones and a slot for your house key MATERIAL: This armband is made of Lycra over Neoprene that is durable yet soft to the touch - Not thin like so many of the others SIZE: Fits sizes from 9 to 15 inches - for larger arms please see our armband extender which is sold separately SAFETY: Night reflector feature allows for increased visibility after dark