Full Details from Amazon.com : http://www.amazon.com/gp/product/B00KDNLL1G?tag=onigi-20

Roomel - Changing Room in a Towel (Navy/Red - Blue/Red)

Built-in Water Resistant Bag
Fully Adjustable Waist Strap
100 Terry Cotton Towel
Valuables Pocket on Bag For Your Keys Cell Wallet MP3 Player etc
Patent Pending Changing Feature Allows for Comfortable and Confident Changes Anywhere