1. WATERRESISTANT DESIGN Full WaterResistant Fabric, bike frame bags are made of ultralight and stylish carbon fiber material and the zippers adopt high frequency seamless welding technology, effectively block rainwater from entering the bike bag quickly. That's the secret of our water resistant bicycle frame bags. 2. 1.5LARGE STROAGE SPACE The bike storage bag has enough inside room for your phone, small tire pump, mini binoculars, cycling glasses, bicycle repair tools accessories, dust masks, keys, wallets, etc. Solve the troubles of long outdoor riding. The three sides of the bike bag :Length: about 10.63 inches Width: about 7.08 inches, Height: about 2.25 inches 3. EASY TO INSTALL QUICK RELEASE: With 3 Adjustable velcro straps can easily fasten on the tube. It doesn't move around even if you ride on a bumpy or rocky road, and fit most mountain, and commute bike. Note: The triangle bag is at a right angle and is suitable for mounting on a bicycle with a rightangle bracket. 4. PROTECTION AND DURABLE: The outside layer of bike bag is PUPolyester, the middle layer is 5mm foam, the inner layer is polyester cloth. The outer layer is very wearresistant, and the foam cotton protects the contents from being damaged.