Rhinowalk Waterproof Bike Pannier Bag for Bicycle Cargo Rack Saddle Bag Shoulder Bag Laptop Pannier Rack-RK19663 20LAbout this item Rhinowalk is focus on bicycle bags, please let us know if you have any problems Fully Waterproof: Made of 1000D polyester material with waterproof PVC layer on both sides, this bike pannier is super stand wear and tear and fully waterproof, as well as anti tear, wear resistant and heat resisting, protecting your items perfectly Bike Rear Bag Large capacity: up to 20L capacity, fully expanded to hold more Bike Rear Seat Rack Pannier