Large Space: Our triangle frame bag measures 28 x 20 cm and offers a generous capacity. It can easily accommodate most essential items, such as a smartphone, wallet, keys, glasses, repair tools, etc., eliminating the need for a tool kit or backpack. Waterproof: Made of polyester, this bike bag features a zipper closure, providing double protection for your belongings. Although it is waterproof, it is not recommended to immerse it in water for a long time. Slim Design: Its slim design and top tube attachment minimize wind resistance and prevent shocks to your legs while riding. This bike bag is lightweight and easy to carry. Details: Three wide, adjustable Velcro straps provide a large support surface for a stable and secure fit. Its sturdy design features a large zippered opening for easy access. The universal angle fits most bike triangles without getting in the way of your water bottle. Practical: This frame bag can hold everything you need for cycling, making it perfect for outdoor activities. It also includes space for valuables and a lock. It can be mounted on most road and mountain bike frames.