Close Out Inventory. New-Old Stock. Limited Quantity Available! Similar to, but not the same, as the modern seal pack. The Original Seal Pack, by Cascade Designs is a water proof fanny pack for keeping your essentials dry and close. Color is black. Large capacity, you could pack a lunch in it. An equally large net outer pocket for items that can get wet. Yes, you can swim with it. It would be advisable to bag sensitive items like a cell phone in a freezer zip-lock.