Lightweight, high performance with free-flow control, heat sink and adjustable cracking pressure

• Inhalation diaphragm provides superior tear strength and improved response time to breathing (super soft silicone molded over a low friction disk).
• Improved exhaust valve ensures dryness and a lower exhalation effort.
• Seat-saving orifice, compliments of Atomic Aquatics, retracts when not in use - extending the life of the breathing tube seat. (#5,803,073)
• Seat comprised of soft silicone molded over a metal insert to deliver the firmness required for an airtight seal while maintaining the necessary elasticity to prevent leaking.
• Redesigned front cover and inhalation effort control knob use co-molded components that provide the necessary grip, soft touch and ease of use. 
• Zirconium-plated inlet tube and heat sink for superior corrosion resistance.
• Redesigned heat sink dramatically increases surface area, aiding in the heat exchange necessary to avoid freeze-up.
• Co-molded silicone mouthpiece for better fit and less jaw fatigue