Its designed to hang on the handlebar of your Brompton bike or to carry in the back when it is not attached to the bike. It has a great capacity. Reinforced to support a lot of weight. The main compartment is fully lined with black nylon, with buckle closure, offers security and with its reflective ends makes its ideal for cyclists. The back it's fully padded and the laptop compartment holds up to a 15" laptop to keep it scratch free. Inside, it has a small interior pocket with zipper. Also, has handy front pocket and two side exterior pockets to hold your water bottle or umbrella and two exterior pockets with zip closure. It's waterproof! The Brompton frame its included. SIZE: 39 x 32 x 14 CMS. Capacity: up to 20 litres. MATERIAL: Recycled (PVC) canvas from Barcelona banners and black nylon. HANDMADE IN BARCELONA: All our models are handmade.