ArcEnCiel Bike Frame Bag Bicycle Top Tube Pouch Waterproof Cell Phone Holder &le; 5.7" Touch Screen 600D polyester fiber material , solid and water resistant Clear transparent PVC window for mobile phone (screen size  5.7") ; it is a great idea to make your phone visible while riding and extremely convenient to use mobile phone map or pick up a call without taking out the cell phone Each side bags with the size of 6.9 * 4.1 * 2 in (L*W*D) , perfect for holding a lot of stuff , such as repair kits and bike tools , wallet , sunscreen , keys , snacks , etc. Velcro strap design for quick release & installation , suitable for most kinds of bicycles Reflective tapes around the bag , for safe riding during the night