Waterproof 30L Backpack Rack Rear Pannier Packing for Urban Bicycle Cargo Backpacking Rucksack

Product Description :  Multiple Storage Options and Large Capacity - 27 L capacity with different built-in compartments for better organization.  The main area of the bag can be used to store clothes, shoes, laptops (below 17inch) and other larger items. The mesh bags on the left and right sides can hold smaller items. There is also a hidden helmet cover and waterproof cover at the bottom for extra storage.  Multifunctional - The bag is applicable for various scenarios. Conveniently switch the bag from a backpack to a shoulder bag with the hidden shoulder strap that is stable and reliable. The Ergonomic S- Shape shoulder strap is great for reducing back pressure and won't put a strain on your back. Can be used as a motorcycle or a bicycle bag. Ideal for daily commute, cycling, or longer travel. To convert to rear rack pannier bag simply secure middle small clip to the rack and buckle on bottom.  Waterproof - Made using high frequency seamless voltage technology which means the bag is f