Designed out of necessity when Hyperlite Mountain Gear's CEO decided to embark on 400 miles of one of the most difficult thru-hikes in the country-the 600-mile traverse of the Grand Canyon below the rim-the stackable, zippered 4400 Pod cleanly organizes a pack for multi-day trips with absolutely no wasted space. The 4400 version is built for 70L packs to make awkwardly-shaped storage bags and subsequent dead space a thing of the past. Constructed from totally waterproof Dyneema, this pod keeps precious gear well-protected from the elements, has taped seams for added insurance against moisture, and boasts zip tabs for easy access to said gear when we're on the move.