Premium Material & Waterproof --- The bike saddle bag is made of 600D Oxford material, which is super waterproof and scratch-resistant. The zipper adopts a seam-sealed waterproof design, which can effectively prevent rainwater from entering the bag, properly protect all your belongings, and keep them dry and safe. [Please do not soak this handlebar bag in water for a long time. ] ADJUSTABLE MOUNTING POSITION AND STRAP MOUNT --- All bodies of the bag feature multiple loops to allow removal of the detachable retaining strap as desired, allowing the bag to be adjusted for rear or front mounting. Comes with 3 adjustable fastening straps, 2 attached to the top tube and 1 attached to the upright tube. Even if you ride on rough roads, the triangle bag will not move around and is very easy to install through the shoulder strap. The bag fits most mountain, road and commuter bikes. Large-area reflective design and well-organized compartments --- This bicycle handlebar bag is designed with a large-area reflective surface, which can improve nighttime visibility and make your riding safer. In addition, there are 2 interior layer pockets on one side of the compartment to help you keep your items organized. Also, there is a hook inside to keep your keys in order. Slim Design and Good Shape --- The front pipe bag is made of high-quality material, which is durable, wear-resistant and in good shape, don't worry about deformation. The slim body design and the mounting position of the bike's top tube effectively help reduce wind resistance and prevent leg impact during riding. Only 175g, super light weight, convenient for cycling.