DURABLE & WATERPROOF: Sturdy and wear resistant, the 600D polyester fabric is an excellent material for outdoor goods. The advantage of water tightness helps to protect your belongings during the rainy days.PU Reflective strip on side of this bike mount pack greatly improve night ride safety.LARGE CAPACITY: 22*11*4.5cm, capacity 0.8L, Large inside room provides enough space to hold up to 6.5 inch cellphs, charge, USB cable, power bank, bike repair tools, all tire pump, flashlight and other all items you will need during long rides.EASY INSTALL: Three quick-release hook-n-loop straps allow you to easily, quickly an firmly mount this bag at front frame of bikes, the bag wont move even if riding on bumpy or rocky road.And it also simple to diount the bag and you can carry it with you.HUMANIZED DESIGN: Our bike bag is suitable for bike top tube perfectly. Your knees would not rub it when cycling, provide you better stability even on a bumpy or rocky road. The airtight zipper prevents your items from dust or sand.REFLECTIVE STRIP DESIGN: With reflective strip on both sides of bags increase your visibility in low light or dark conditions, and provide a safety signal in the night while cycling. And several divided pockets in the bag allow you to store various kinds of items.