Water Resistant Material Waterproof Zipper --- This under bike saddle wedge bag is made of strong and durable duty polyester material, water and weather resistant, keeps your gear safe from the dirt, mud and dust, keep your belongings dry and secure. Very easily to clean the surface just wipe by hands. Streamlined Design Well Shaped --- The aerodynamic design and install position of under bike seat effectively help to minimize the wind resistance and suitable for long riding. The saddle bag also with built-in supported shell and padded with EVA foam, which helps maintain the shape well and protect the inside items, even for bumpy road. 1L Large Capacity Lightweight --- This bicycle repair tool bag with 1L space to store phones up to 6.5 inch, tyre levers, multi tool, puncture repair kit, keys, money, small tools etc. The inside of the cycle saddle bag has a net pocket to keep small items collected and easy to access. Meanwhile the seat bag is as light as 3.8 oz/107.7g, ideal for long riding trip. Fast Install Universal Fit --- Adjustable fastener straps ensure to attach the wedge pouch to the seat post in seconds, 3 point fixing secure the bag firmly and non-shaking. And it is also convenient to remove by releasing the straps and the locking tie. The bike underseat bag universal fits for most mountain, road and commute bikes. Reflective Strip Safer Riding --- In the tail part of the pouch, there are built-in reflective elements and taillight hanger, additional tail light (sold separately) could be used to increase visibility for motorists. And the two side reflective logo also help to cycling safer in night.