Patagonia Black Hole Duffel 40L – Black Flag Outfitters。Body is made from weather- and abrasion-resistant 100% recycled polyester ripstop with a matte Padded, removable shoulder straps let you carry the Black Hole Duffel like a backpack and can be detached when not in use A zippered side pocket can be reached from the outside or inside of the bag, and when empty, the duffel stuffs into the pocket for compact, self-contained storage; an interior mesh lid pocket keeps essentials organized and close at hand Padded base protects the contents of the duffel from rough terrain and hard knocks Sturdy, reinforced exterior daisy chains provide myriad lashing options for extra gear This 40-liter duffel fits most airline carry-on requirements