Water Dust and Sand proof Bag Workout Accessory with heaphone Pass-through for use with the Cowon iAudio X5 Made of powerful TPU material which is 10 times stronger than cheaper vinyl versions Special 3.5mm pass through connection enables headphone connectivity to the iAudio X5 while maintaining water tight integrity inside Ideal support for device with internal 103.8 x 61.3 x 15 mm internal dimensions Provides a safe Waterproof (up to 3m), Sandproof and Dustproof environment Floats with your Cowon iAudio X5 inside