The Octopus Loop allows the hose to be positioned below the shoulder. This configuration is ideal for technical diving, but many divers have also preferred it for recreational use. The Loop second stage can be used on the right or left side, depending on the diver's preference. Made of robust, ultra-lightweight technopolymer. With a Vortex Assisted Design (VAD) system that permits dynamic air flow, ensuring natural and easy breathing at any depth. Dual vent valve system: the dual vent valves increase performance by decreasing exhalation resistance. Oversized silicone exhaust button.