This new super heavy duty Sea To Summit Hydraulic Dry Bag 65L is specifically designed to withstand extreme conditions that demand toughness and abrasion resistance. The Hydraulic is made with 600D TPU laminated fabric with a completely welded construction for durable waterproof seams and a snag free seam profile. The fabric is PVC free and UV resistant. It sheds water and does not crack in extreme cold. The unique molded interlocking closure securely seals the bag for waterproof performance. The dry bags have an oval base to resist rolling and take less room when stacked. Heavy duty Hypalon lash loops are RF welded at the sides and provide secure attachment or lashing points.