One side can hold small things like your ID, cash, keys. You can put your phone, bike light and repair tools on the other side Waterproof design: Adopt seamless welding technology, sealed zipper and fully waterproof material This top tube bag is built to withstand heavy rain. Forget the weather and enjoy your ride Double-sided zipper: This bike bag features sealed zippers on both sides. The zipper with smooth pull function includes the zipper body and zipper cord You can easily remove bicycle accessories from the bicycle bag<br><br>Easy to install: With 5 long adhesive straps, you can mount the bike bag on the top tube of the bike, under the top tube of the bike, or on the down tube Colour:Black Material:Polyester<br><br>Package Contents: 1 x Bike frame bag<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.