【3D Harder & Pressure-Resistant Bike Bag】This hard casing bike bag is made of tough EVA material and is 3D die-cast. The solid shape makes it not easy to deform, the appearance of three-dimensional shape looks very fashionable, the outer PU carbon fiber can be highly wear-resistant and durable. This bike bag is the perfect and indispensable bike accessory【Enhanced Riding Experience】Equipped with a high-sensitivity TPU thin-film window, this bike phone bag lets you effortlessly use your phone while riding. Check your activity or navigate maps without stopping. (Note: Thin film for touch screen function may lead to increased phone temperatures in very hot weather.)【Thoughtful Design for Safety and Convenience】This bike frame bag is packed with user-friendly features. A hidden headphone port lets you take calls or enjoy music while cycling. The double soft rubber zipper heads provide easy access.【Excellent Waterproof Performance & Reflective Design】The front storage bag is made of waterproof polyester fiber. Fitted with seamless double zipper, it can keep your items dry even in rainy days. And unique reflective logo design makes travel safer at night.【Quick Installation & Disassembly】The three fasteners design makes it more stable than regular straps and can also be removed faster. It is portable enough not to interfere with your front rack setup. It also stable enough and would not move around even if you are riding on a bumpy or rocky road