Rubberized Double Zipper & Waterproof Material – With waterproof PU material, seamless waterproof zipper, along with hard frame, this bike triangle frame bag is durable, shake-proof and non-deforming, as well as perfectly protecting your items in rainy days and extreme environments. It is easy to clean by wiping the surface. (Note: please not let the bike bag stay in the rain for a long time). Stiff & Stylish – Constructed of tough EVA with 3D die-casting process and textured grain PU fabric with outer material carbon fiber, this bike triangle frame bag will look stiff and dynamic at any time. Also, this bike storage bag can be highly abrasion & shock proof and durable. It can protect your stored precious items. Your beautiful bike deserves a matching bike bag! Big Space & Compatibility – This bicycle storage bag is designed with 2 mesh inner pockets for storing a lot of small items, such as phone, keys, wallet, glasses, gloves, earphone, battery, pen, small repair tools, energy stick, small tire pump, power bank, mini flashlight, USB cable, other accessories without the need for a backpack, etc. It is very useful for your cycling tours. Slim Design with Big Opening Mouth – The slim body design with lightweight, ideal for long cycling trip. The bike triangle bag is below bike top tube effectively help to minimize the wind resistance, and prevent legs hitting during riding. Perfect for most mountain, road and commute bike. Durable big zipper and opening mouth are easy to access. Easy to Install & Disassemble – With 3 Adjustable velcro straps, this bicycle triangle bag can be easily fasten on the tube, providing stable and firm installation. It doesn’t move around even if you ride on a bumpy or rocky road. Universal angle and long straps to fit most bikes’ triangle frames, and it won’t encroach on your water bottle, so it fits most mountain, road and commute bike.