【SUPER TOUGH FABRIC】The Submersible Lumbar Pack is built super tough 900D TPU coated fabric,If you're not used to burly waterproof backpacks and dry bags, you might be surprised at how stiff the fabric is, but it's what you need for waterproof bags you want to last for a decade or more.  So the 900D TPU coated recycled nylon is great.
【WATERPROOF ZIPPER】The fully waterproof zipper will protect your flies, accessories, phone, camera, or sandwich if you wade deep or get caught in a rainstorm. You can spin a lumbar or waist pack around your waist to the front for easy access to tippet, flies or fly fishing accessories.
【MULTIPLE POCKETS】The main pocket is about 10L (610 cubic inches) and measures approximately 13.5″ x 9″ x 4.7″. Water-resistant front ZIPPER pocket measures approximately 7.6″ x 5.7″ It's large enough to stow a few fly boxes, a backup reel or spool with a different fly line and plenty of accessories like leaders, strike indicators, and weight.  It has a slim interior stash pocket as well as a zippered accessory pocket.
【CONSTRACTION】The fishing waist pack buit in four of integrated net slot;Exterior 5 reinforced cord loops;Two stout hook-and-loop straps let you stow more gear than typical chest packs, plus you can carry the pack behind you out of the way.  Fly fishing packs are awesome and hold the most gear,An integrated net slot keeps your landing net ready, when needed, which is hopefully, often.