About this project Waterproof: The bike bag is made of 840D nylon material with seamless crimp technology that prevents 95% of water from entering the bag. A waterproof bike bag can hold your clothes, tools and plenty of cycling gear. Go horseback riding on a rainy day.MAXIMUM CAPACITY 4L: This bike triangle bag is designed for road bikes and commuter bikes. Length: 17.7" Width: 3.1" Height: 6.7". With a capacity of 4 liters, it is more suitable for long bike trips or everyday use. (The bag is huge, please measure your bike before placing your order.)Won't Kick: Bike Frame Packs are perfect for your road bike frame. The slim body makes it fit better in the frame. The bike bag is only 3.1 inches wide, say goodbye to the crash bag. Air-tight zippers: The waterproof bike bag features two air-tight zippers that prevent more than 95% of rain or water from entering the bag. The zipper has a small cap at the beginning for optimal water resistance. After testing, the package is IPX5. (For best water resistance, make sure the zipper is closed and hidden under the lid.)Stable and Durable: The bike bag is secured with 5 straps. The bag does not shake and hit the legs. Since the frame bag is fixed with straps, please do not put anything over 4KG. It is safe.