The Hydraulic Dry Bag is the burliest dry bag that Sea to Summit makes. It is designed for demanding conditions where rough and tough treatment is to be expected. The 600D heavy duty abrasion resistant TPU laminated fabric and RF welded construction throughout give the Hydraulic its superior strength. The interlocking non-wicking roll-top makes it easier to close the large format closure, and RF welded lash loops provide secure attachment points. An oval base means the dry bag won’t roll away when you set it down.