A seriously hardcore, waterproof, duffel/backpack. Gas tight, T-style, waterproof zipper and heavy-duty 600D PU – coated material. Giving you the confidence to take on the gnarliest of water adventures. Featuring the new Ergo LocoModiv™ shoulder straps with the patented UniLoop™ system – allowing you to easily swap between the included black and neon green breathable, strong, grippy, stretchy, and customizable shoulder straps. Easily switch between duffel style grip or throw it on your back for a convenient and comfortable portage. DownUnder ZipDuff gives you the waterproof protection you need at the cost you want.