Pop Quiz Backpack 25L Gargoyle designed with extra depth to carry comfortably with EVA designed with extra depth to stack packing cubes and an internal compression strap to secure them Attaches to your luggage with a Zippered trolley sleeve this backpack has multiple pockets — inside and out — to keep everything organized on journeys to school or work ' EcoSystem 600D Fabric made from 100% recycled post consumer water bottles Tonal stripe EcoSystem Liner made from 100% recycled post consumer water bottles Padded floating sleeve fits a 15" 16" laptop Zippered closures carry comfortably with adjustable EVA padded shoulder straps Water bottle pocket expands to fit different sizes side storage sleeve for Quick reach items Keep essentials in place with a front pocket organizer and Key Clip Stash pocket for storing Sunglasses or small essentials Put Yourself Out There Internal label Herschel Supply DNA shoulder tab Internal Herschel Supply stripe DNA tab