Will any size CO₂ work on your inflatable life jackets?

It is critical to use the specific CO₂ cylinder size designed for your model. Inflatable life jackets (PFDs) vary in size and buoyancy levels; using the wrong cylinder can lead to a dangerous lack of flotation or damage to the vest.

Why Size Matters

The amount of CO₂ gas required depends on the volume of the internal bladder. For example:

• Small/Low Profile: The MIT 70™ provides 15.7 lbs of buoyancy and requires a 17g cylinder.

• Standard/Offshore: High-buoyancy models (like those providing 35 lbs of lift) often require a 33g cylinder.

If the cylinder is too small: The vest will not fully inflate, leaving you with insufficient buoyancy to keep your head above water. If the cylinder is too large: The excessive pressure could potentially rupture the bladder or damage the seams of the vest.

How to Find Your Correct Size

You don't have to guess. There are two easy ways to verify what you need:

1. Check the Internal Label: Every PFD has a technical label printed on the inside fabric (usually near the inflation mechanism). It will list the exact gram weight (e.g., "17g", "33g") and the specific Re-arm Kit name.

2. Use the Re-Arm Kit Finder: Visit our [Re-arm Kit Finder] tool to match your PFD model name to the correct replacement parts.

Safety Tip: Always check your cylinder for corrosion or small punctures before a trip. If the seal is broken or the metal looks rusted, replace it immediately, even if it has never been used.