AKONA New Deluxe Mesh Backpack with a Full Length Side Zipper (AKB234) Large Enough to Carry a Complete Set of Gear Full Length Side Zipper for Your Convenience MATERIALS: 600D poly-natural fiber blend with polyurethane interior coating. Constructed of heavy duty PVC coated high-strength mesh. Incredibly durable, water and stain resistant. INTERIOR: Zippered full-length dry pocket, double coated PVC bottom material and nylon seam binding. ZIPPERS: AKONA utilizes heavy duty YKK #10 Delrin molded and YKK #5 marine grade bronze for Superior rust and corrosion resistance. The slides and pull are rustproof and provide strength and protection from rugged environments and corrosion.