Made from 12 recycled PET bottles Lockable notebook compartment surrounded by High-Density Foam protective padding Reliable fastening for devices thanks to the elastic notebook securing strap. Spacious main compartment with padded slip pocket for tablets measuring up to 32.8 cm (12.9") Expandable inner pocket with fastening strap for headphones Front pocket with functional compartments for smartphone, portable charger, pens and other items Space-saving side pockets for an umbrella or water bottle Ergonomic back padding and comfortable shoulder straps Trolley strap