★Large capacity—-40.5 * 12.5 * 6cm. 3L large capacity, perfect for holding cycling essentials, such as: wallet, phone, keys, tire, glasses, repair tool kits, mini pump, energy gel, gloves and etc. ★Waterproof—-High quality nylon fabric outer material and inner TPU material offer a comprehensive protection for your belongings, Unique waterproof glue zippers in double sides will keep your accessories dry. ★Humanization Design—-It’s only 6cm width, it would not rubs against your legs while riding. Double sided reflective logo can provide night riding reflective warning, enjoy a safe journey. ★Easy to Install&Release—-5 velcro straps and 11 install holes around the bag. You can adjust the quantity and position of the straps according to your needs.