The Highland Vortex is designed for cold, deep, sidemount, twin-cylinder, and extended-range diving. Its environmentally protected first stage and adjustable, pneumatically balanced second stage are built for dependable performance in demanding conditions.Choose your configuration carefully: some options include a complete first- and second-stage set, while others include only the first stage or only the second stage.Cold-water and technical features Suitable for water below 50°F / 10°C EAN40 compatible out of the box DIN and yoke configurations available Swivel turret with an end-mounted fifth low-pressure port Two high-pressure ports External environmental diaphragm and integrated heat-exchanger ribs Adjustable inhalation resistance and venturi control Comfo-Bite mouthpiece Flexible MiFlex braided hose on complete-set configurations Questions about stage selection or hose routing? Contact the shop before ordering and we’ll help you choose the correct configuration.