rolltop backpack - Rolltop backpack with metal buckle closure, main compartment with zip compartment and dual partitioned slide-in pocket with Velcro fastening, front pocket with zip, 2 side pockets, secret compartment on the back, padded shoulder straps, loop to attach to trolley, offset stand-up bottom part, capacity approx. 15 litres, load capacity up to 15 kg.