The ideal backup breather for your dive system, the S270 Octopus is tough, reliable, and easy to use. Its air-balanced design can be counted on to deliver top-notch breathing performance when you need it most. Lightweight Scubapro S270 casing is made of a fiberglass-reinforced nylon core and a special polyurethane (PU) outer layer, is extremely durable plus helps reduce jaw fatigue and improves diving comfort. Regulator second stage has a techno polymer plastic barrel with a metal thread and a balanced valve that helps save weight and provides a surface that ice crystals can't grab onto when diving in extreme cold water. Air-balanced valve smooths out the inhalation effort when diving at varying depths and supply pressures. Dive/predive switch is easy to use even wearing thick gloves. Compact and efficient exhaust tee minimizes exhalation effort. Compact hi-flow mouthpiece is comfortable, made with FDA-approved silicone and features a large cross-section to maximize airflow. High-viz yellow front cover stands out, making it easy to spot when needed. High-viz 3/8" threaded yellow super-flow LP hose is 39" (1m) long with an oversized bore that allows more air to flow on each inhalation. Second stage includes a reusable mouthpiece clamp. Octopus weighs 12.8 oz (363g) with hose.