Stowaway packs attach under your canoe seat with two side-release buckles. Unlike thwart bags, they can be left in your canoe during portages. They are the perfect storage place for items you really want to keep accessible and out of the bilge water. A rigid plastic bottom keeps the bag from sagging when it is heavily loaded, and can be removed to double as a cutting or fillet board. There are 2 different models in High Tenacity 210 Denier Cordura fabric. The Original fits bench style seats best but will also work with most tractor style seats. The Padded is the same size as the Original but has the benefit of a padded seat pad.