The osprey ultralight stuff pack can be stuffed away into its own carry case within seconds no larger than the size of an apple built with a deluxe airmesh harness this backpack offers a comfortable carry unusual for a compressible pack of this size the osprey ultralight stuff pack is made from a fully waterproof coated fabric which means you wonrsquot get caught out in the event of a light drizzle or sudden downpour for organisation and easy access osprey have included a zippered stash po