This new super heavy-duty dry bag is specifically designed to perform in extreme conditions where toughness and abrasion-resistance are demanded. The Hydraulic is made from 600 denier TPU laminated fabric with a completely welded construction for durable waterproof seams and a snag-proof seam profile. The fabric is PVC-free and UV resistant and won't crack in the extreme cold. The unique interlocking moulded closure securely seals the bag for waterproof performance. The drybags have an oval base to resist rolling and take less room when stacked. Hypalon lash loops are RF welded to the sides and provide a secure lashing or attachment point.