Sea to SummitHydraulic Dry Pack The removable harness on the super-tough, burly Hydraulic Dry Pack makes portaging a whole lot easier—whether on the river, in the airport or anywhere else where carrying large amounts of gear is a chore. The Hydraulic harness is an open construction of EVA foam and air mesh, allowing plenty of air flow and rapid drying without sacrificing comfort. The harness attaches to compatible Hydraulic Dry Bags (35L–120L) with a series of buckles as tough as the bags themselves. Nylon. Imported.