The Tongass Dry Bags feature water-tight 420D Nylon fabric with dual-sided TPU/PU coating. These fully welded, roll-top dry bags are abrasion resistant, and highly water-resistant; offering maximum protection for your gear. The oval base and shape allows for easy stuffing and minimize rolling. Umpqua goes the extra mile on this roll-top bag design with two tarpaulin bands to enhance water-resistance. The convenient D-ring located on one of the clips can be used to readily secure the bag to a boat or raft.