Roll top backpack with magnetic metal safety closure, water-repellent zips on the outside, main compartment: 1 zipped compartment incl. secret compartment for mini tracking devices (e.g. APPLE AirTag®) + 2 slide-in compartments with Velcro fastener, front pocket with hidden zip slider as mini carabiner (theft protection), 2 side pockets, secret compartment on the back, padded shoulder straps, loop for attaching to trolley, offset stand-up bottom part, capacity approx. 17,5 litres, load capacity up to 15 kg, resistant material, splash-proof (IPX4 waterproof grade), Tarpaulin: 80% Polyester, 20% Polyurethan (PU), polyester, polyurethane, tarpaulin (tarp), black