WATERPROOF MATERIAL: This bike bag is made of waterproof material, designed with dual waterproof zipper keep your items dry when you meet rainy days or extreme environments. HARD SHELL SURFACE: Designed with special EVA hard shell material, wearable,durable and drop resistance, protect your items well when getting external shocks. SENSITIVE TOUCH SCREEN With High-sensitivity TPU film window on the bike front frame bag, easy to operate your phone by hand while riding. Large screen perfect compatible with cellphones below 6.5 inches like iPhone 11/12 Pro XR XS MAX 8 7 6s. LARGE STORAGE SPACE: Holds a lot of stuff like cellphone, wallet, credit cards, keys, energy bar, sunglasses, repair tools or other cycling essentials. Two mesh pockets on both sides of the bag make your items can be stored separately and keep tidy. HUMANIZATION DESIGN: 1.Designed with holes on the protective pad on the back of phones, which prevent the phone from being heated for a long time. 2.The hidden earphone hole allows answer the phone or enjoy music freely while cycling. 3.Reflective tape on both sides of bike phone bag keeps your night cycling safety effectively.