Large capacity and waterproof - This rear saddle bag offers a spacious interior to hold your essentials. It is made of waterproof material to protect your belongings from rain, keeping them dry and safe. Durable and reflective design - The bag is built with wear-resistant and scratch-resistant material for long-lasting use. Its reflective design enhances visibility and safety during night rides. Wide compatibility - Designed for electric bicycles, road bikes, and mountain bikes, this bag is compatible with a wide range of bike models. Convenient and secure - The U-shaped double opening on the bag cover provides easy access to your items. The elastic cord buckle keeps belongings securely in place. Side pockets and reflective piping/ribbon add extra functionality and visibility. Practical use scenarios - Daily commuting in wet weather: roomy enough for a rain jacket, phone, wallet, and small tools, with rain protection to keep contents dry. - Weekend rides or bikepacking: stores snacks, repair tools, spare tube, and essentials within quick reach. - Night rides or low-light conditions: reflective features improve visibility while you access items via the easy-open lid.