Our 40L double bicycle bag is a strong bag with reinforced backside and bottom, made from recycled PET material (RPET). The bag has two large compartments with a total capacity of 40 liters. With the chrome hooks, it is quick and easy to open and close the bag whenever you like. The bag is made from waterproof RPET and has a water resistant lining on the inside for extra protection of your belongings. With the fastening straps, you can easily attach the double bicycle bag to the luggage carrier of your bike.