Spare Air - The life-saving mini SCUBA tank. There When You Need It! Spare air is the preferred choice of both professional and sport divers for a very good reason....It saves lives! Self-contained and user-refillable, it is a total redundant back-up miniature scuba system. In case of emergency, Spare Air provides you with enough air to safely get back to the surface. Even if you never use spare air, it's always there as your backup. Submersible System Spare Air Model 300 Package Kit 3.0 cu ft w/Free Coil Lanyard Spare Air Spare Air is the preferred choice of both professional and sport divers for a very good reason....It saves lives! Self-contained and user-refillable, it is a total redundant back-up miniature scuba system. In case of emergency, Spare provides you with enough air to safely get back to the surface. Even if you never use Spare Air, it's always there as your backup. Tested Tested and approved by the U.S. Navy, Spare Air is a totally self-contained, refillable backup air system that's small and easy to use. Spare Air allows for minimal interaction with your diving buddy and is simply dependable. Redundant Scuba System Spare Air is the smallest redundant SCUBA system available and is packed with 3000 psi to provide you with enough air to get you to the surface in an out-of-air emergency. Yet, it is small enough that you don't even know you are wearing it! Spare Air should be a standard piece of scuba diving equipment for the safety minded diver. Reserve Parachute A skydiver wears a reserve parachute, a SCUBA diver should have a reserve breathing system. For 40 years we’ve supplied divers with the smallest, most-compact redundant system available for out-of-air-emergencies. The patented Spare Air should be a standard piece of SCUBA diving equipment for the safety minded diver. In an out-of-air-emergency, why would you trust your life to anything else? Spare Air Tested Redundant Scuba System Reserve Parachute