Feature: 1. EASY TO INSTALL: Fits any bike with a frame. With three hook and loop fasteners closures, you can adjust the cell phone pocket of the bike to the frame of the bike. The frame bag fits your bike perfectly! Very convenient to install and remove, never disturb your knees or legs while riding. 2. WATERPROOF: The triangular bike bag is made of water repellent material and with waterproof zippers. It is more durable and yet super light. Our frame bag is waterproof and keeps your stuff dry when you cycle. However, this frame bag cannot be exposed to heavy rain or submerged in water for a long time. 3. LARGE SPACE: Large interior space for cell phone, power bank, repair kit and more. With a side zipper, your items are easily accessible, cell phone, cycling gloves, mini pump, repair tools. 4. Ultra-thin DESIGN: Lightweight Slim body design and bicycle top tube installation position effectively help minimize wind resistance and prevent legs from colliding while riding. 5. CONVENIENT EQUIPMENT: The outer layer of the bag is made of scratch and abrasion resistant material which can better protect your items and is easy to clean by wiping the surface. Specification: Name: Mountain bike bag triangle bagMaterial: Oxford clothOpening method: zipperColour: BlackSize: 20*20*27CMWeight: 60g Package List: 1*Bicycle frame bag