As the name suggests; spare air. Because in an emergency situation, it's not about your last breath, but rather the next breath you're out of! And then there is Spare-Air! You assume you will never need it, but in case an emergency situation arises then it can save your life. 

The 3.0 Spare Air pack is the most popular model sold. Designed to get you to the surface in an emergency, but small enough that you won't even know you're wearing it! Easy to travel with! Easy to carry! Easy to refill! Easy to transfer to a fellow diver in trouble!

Product specifications:

• Part number: 300HP
• Length: 13.4 "[34 cm]
• Diameter: 5.7 cm
• Weight (complete): 2.2 lbs [0.98 kg].
• Cylinder pressure values: 3000 PSI [207 BAR].
• Cylinder volume: 3 litres [85 litres]
• Cylinder material: Aluminium - black anodised
• Pressure relief: Integrated in regulator
• Controller type: Balanced single-stage
• Operating temperature: -22 ° F [-30 ° C]+ 158 ° F [+ 70 ° C].
• Duration of air supply: about 57 breaths at the surface