Inspired by New York City bike couriers, the Daypack Proof Edition impresses with plenty of style and functionality. This waterproof laptop backpack from AEVOR, made from polyester made from 50% recycled PET bottles, safely and securely transports your laptop in a separate compartment and is large enough for A4 folders. If you suddenly find yourself with more than you originally planned at the end of the day, the volume of the Daypack Proof Edition can be expanded in a snap.