Bag can seal in 2 different closure methods, over the top or down the sides. Extra-large buckle ensures roll stays closed in all environments. Air purge valve makes compression easy. Reflective webbing and external bungee storage system. Included quick release buckles convert bags into the perfect waterproof tail packs. Inner sleeve to hold most folders, notebooks, tablets and up to 15” laptops. Removable MOLLE panel is reversible with waterproof document/map pocket. Integrated front pocket. 2 Side mesh pockets large enough to hold 30 Oz. fuel bottles (Bottles not included). Backpack straps are 3-way adjustable and padded for comfort, pack back panel is padded with airflow system.