The Mares Dual Octopus has a pneumatically assisted design, ensuring high airflow at all times. It is made from a lightweight technopolymer weighing only 183 grams. The tehcnopolymer is abrasion resistant and ideal for diving in warm and moderate water temperatures. It comes with a Superflex hose that is extremely lightweight and has exceptional softness, guaranteeing maximum freedom of movement. The vortex-assisted design ensures that the air bypass tube delivers air to the mouthpiece, creating a swirling vortex with a low-pressure area in the center that keeps the diaphragm down during inhalation. This allows for very sensitive and easy breathing at all depths. The Octopus Dual is made of ultra-lightweight technopolymer which greatly reduces its weight (it weighs only 183 g).It has a pneumatic-assisted (P.A.D.) design that ensures high airflow.Equipped with a Superflex hose. ULTRALIGHT TECHNOPOLYMER Abrasion resistant and affordable, ideal for diving in warm and moderate water temperatures. VAD - VORTEX ASSISTED DESIGN The air bypass tube delivers air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very sensitive and easy breathing at all depths. SUPERFLEX HOSE Extreme light weight and exceptional softness guarantee the maximum freedom of movement.