BC with an integrated weight system: expandable zip pockets, adjustable waistband, two manual valves, a new integrated weight system with the Quick lock system, overmolded backpack, protective padding under the valves, and Trim Weight for housing rear weights are just some of the many characteristics which make the Talon BC one of the best products in its category. Exterior of the buoyancy bag is made of Duroskin. Extremely durable 420 D nylon is used for the interior.