Most Compact Second Stage in Scubapro's Line, Lightweight, Breathes Smooth and Extremely Easy, Diver Adjustable Inhalation Effort for Personalized Breathing Control, Venturi Initiated Vacuum Assist (VIVA), Dive/Pre-Dive Control Switch, Prevents Free Flow in Cold Water, Linear Air-Balancing Valve, Top-Notch Air-Balancing System, Compact Body and Exhaust Tee, Takes Up Little Space in Travel Dive Bag, New Poppet & Lever: Maintains Same Overall Size of C350, Stainless Steel Cover Frame Adds Some Style, Large Purge Button: Easy to Activate, Even Wearing Thick Gloves
Compact Ultra-Comfortable Orthodontic Mouthpiece.