The Mares Rover Octopus guarantees high performance, even during intensive use. The new large purge button features a "dynamic hinge" design, which makes it easy to use, even with a single finger. It also prevents free flow in the event of strong currents and is made of a durable rubber material that can withstand over 113,000 venting cycles. The patented Mares Vortex Assisted Design (VAD) system combined with the Fluid Dynamic Deflector (FDD) allows for natural breathing at all depths.