The Typhoon Osea 30L Dry Cool Bag is constructed from a highly durable, 500D tarp outer material that is 100% waterproof, which when combined with the internal integrated cool bag system, offers an effective solution for keeping contents dry and cool whilst on the water. Features:  100% Waterproof with internal welded seams Water resistant 500D reach compliant tarpaulin material Internal cool bag system Adjustable roll top buckle closure Adjustable shoulder carry strap Name tag details on base Typhoon outer cloth drawstring bag included