Orvis Pro Waterproof Backpack - The gold standard of day pack design, our PRO Waterproof Backpack 30L offers superior field performance. Made from 840-denier, abrasion- and puncture-resistant ballistic nylon Coated with .1mm waterproof TPU on both sides Slightly longer back panel repositions lumbar straps better across hips for weight distribution Submersible, blow-out free, #10 TIZIP MasterSeal zipper Generous opening dimensions for easy access Perforated, 10mm foam padding shoulder straps and back panel Integrated back panel net scabbard and exterior D-ring Rod tube cam straps Water bottle pocket with retention leash Internal hanging pockets Accommodates our 3L Chest Pack and 2L Chest/Hip Pack 30L/1830 cu. in.