Watertight Workout Bag for Protecting the Apple iPod Nano from Water Dust and Sand Made of powerful TPU material which is 10 times stronger than cheaper vinyl versions Ideal support for device with internal 103.5 x 62.6 x 11.2 mm internal dimensions Special 3.5mm pass through connection enables headphone connectivity to the iPod Nano while maintaining water tight integrity inside Large, clear front window enables clear visibility and button access to Apple iPod Nano Three carrying alternatives (one neck and two arm strap styles) are included