Spare Air 300 standard package with cylinder, holster, mouthpiece and refill adapter shown front view.
Spare Air 300 complete kit with cylinder, holster, mouthpiece, refill adapter, lanyard and product box.
Hand holding the Spare Air 300 cylinder to show compact handheld size and design.
Spare Air refill adapter for filling the cylinder from a standard scuba tank valve.
Hand attaching the Spare Air refill adapter to a scuba tank valve during the refill process.
Spare Air 300 yellow holster with straps and mouthpiece cover shown in front view.
Back view of the Spare Air 300 yellow holster showing mounting straps and mouthpiece cover.
Black coiled lanyard with clip for securing the Spare Air 300 during diving.
Close-up view of the Spare Air pressure gauge showing PSI and BAR levels.
Spare Air DIN refill adapter for filling the cylinder from a DIN scuba valve.
Submersible Systems

Spare Air 3 cu.ft. Package – Emergency Backup Breathing System

Sale price$299.99 Regular price$350.00
Save $50.01

Choose from these options:

Cylinder Markings: DOT (USA/Non-EU)
Refill Adapter: Yoke (910C)
Pressure Gauge: Pin Style Pressure Indicator

Don't Go Down Without It!

A skydiver wears a reserve parachute. A SCUBA diver should have a reserve breathing system.

For over 40 years, Spare Air has been the smallest, most compact redundant air system available for out-of-air emergencies. Trusted by over 400,000 divers worldwide, this life-saving equipment is designed, engineered, and manufactured in the USA by the original inventors of the patented Spare Air system.

Why Choose Spare Air?

  • Easy to travel with – Compact 13.4" design fits anywhere
  • Easy to wear – Lightweight at just 2.2 lbs when full
  • Easy to refill – Fills directly off your SCUBA tank with included adapter
  • Easy to hand off – Quick-release system for assisting fellow divers in trouble

Complete Package Includes:

  • SPARE AIR breathe-on-demand, balanced single stage regulator
  • 3 cu.ft. black anodized aluminum cylinder
  • 910S refill adapter – fills off SCUBA tank
  • 973 covered holster – mounts securely to BC
  • 961 safety leash – prevents loss

Professional-Grade Life Support

Submersible Systems has been manufacturing dive safety equipment for over 50 years. Every Spare Air and HEED unit is proudly made in the USA with rigorous quality standards. With 57 surface breaths* of emergency air, you'll have the peace of mind knowing you have a reliable backup when you need it most.

European Union customers: Select the option to request ISO marked cylinder at checkout.

*Based on 1.5 liters per breath

Technical Specifications

  • Part Number: 300PK
  • Dimensions: 13.4" L × 2.25" diameter (34 cm × 5.7 cm)
  • Weight (full): 2.2 lb / 1 kg
  • Pressure Rating: 3000 psi / 207 bar
  • Cylinder Volume: 3 cu ft / 85 liters
  • Water Volume: 30 cu in / 0.5 liters
  • Cylinder Material: Aluminum – Black Anodized
  • Pressure Relief: Integrated in regulator
  • Regulator Type: Balanced Single Stage
  • Operational Temperature: -22°F to +158°F (-30°C to +70°C)
  • Surface Breaths: 57*

For bulk orders, contact us directly at info@submersiblesystems.com

For more information, visit spareair.com

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