Enjoy consistent cooling with Phase Change Cooling technology called CoolPax™

CoolPax™ is our incredible Phase Change Material (PCM) system. It uses a non-toxic carbon-based liquid that freezes at 14°C and remains at that temperature for 2-3 hours.

Simply place PCM CoolPax™ inserts in freezer or ice water for 35/40 minutes and insert into garment pockets.

CoolPax Technology Products

A wide range of products use CoolPax™ Phase Change technology from cool vests for sport (sometimes known as Ice Vests) to cooling neck bands and brow coolers. Even dog beds!

Some of our best-selling CoolPax products


  • Inserts will remain at 14˚C consistently for 2-3 hours
  • 30% lighter than ice vest systems
  • Takes 35-40 minutes to activate
  • Inserts made using Phase Change Material (PCM)
  • Ideal for tunnels, factories and foundries
  • The perfect solution for enclosed environments

The Science

Phase Change diagram

A phase-change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy.

Heat is absorbed or released when the material changes from solid to liquid and vice versa; thus, PCMs are classified as latent heat storage (LHS) units. TechNiche uses phase change material for cooling.

Where are our products used?

  • Sports market
  • Industrial market
  • Military market
  • Medical market
  • Pet market
  • Equine market
  • Motorsport market

Select a market to find out more