Mystery Ranch Radix 57 Gear Reviews Archive Believe in the Run Mystery Ranch Radix 57 Mystery Ranch Men's Radix 31 Pack White Hunter Outsiders Store UK. Lighter, fasterand stronger! The RADIX 31 was designed knowing a little less weight can make your mountain mission a whole lot better. Crafted from lightweight Ultra PE Birdseye and durable, recycled Robic Ripstop fabric, this pack takes the edge off those grueling ascents without sacrificing toughness. An array of adjustable features, like a removable frame, and plenty of external pockets helps you master the game of cubic inches. And the option of womens or mens harnessing provides a natural and comfortable fit. Features Off center zipper for more convenient accessibility Removable pocketed waistbelts keep your essentials close at hand on the trail Adjustable lightweight harnessing makes your hike that much more comfortable Easily compressible front and side pockets are perfect for holding light layers, water bottles, and or things you need to get to or stash away quickly Mens and womens harnessing options for a superior ergonomic fit with your body Hydration reservoir compatible Materials Technical Ultra PE Birdseye Recycled 100D Robic Ripstop YKK zippers