Hyperlite Mountain Gear’s Metro pack ($128) weighs only 5.8 ounces; that’s comparable to a high strength garbage bag. So how does such an ultra-light bag stand up to the rigors of backcountry adventures? Easy, it is made from similar materials used to make sails and blimps, so the fabric is waterproof and an order of magnitude stronger than steel. Sail fabric holds up to the element for a number of reasons including… Read More