【Water Resistance】The surface waterproof material and rubber zipper of the cycling saddle bag is effective against rain and protect valuables from water, dirt and dust. The bike saddle bag is waterproof and can be cleaned easily by simply wiping it with your hands. Making you enjoy cycling in raining.【Premium Sturdy Material】 Made of tear-resistant PU and hard shell EVA.It's not only holds it's shape, but also highly tear resistant.It's waterproof, durable and easy to scrub. Solid shape protects items. Perfect size for all your essentials.【Easy To Install】 Easy to install and quickly remove. The sticky loop and quick-release buckle help to fix the bag on the saddle rack and seat post easily and firmly. It can maintain stability even on rugged roads.【 Reflective Trim Design】Reflective logo and strip enhances visibility and safety at night. The taillight attachment accommodates a flashing safety light (light not included). It's very necessary for somebody who likes to ride at night or uses their bike for commuting.