Good to know how to choosing the right cooling products

Enjoy consistent cooling with Phase Change Cooling technology called PCM

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


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. Procool uses phase change material for cooling.

Why Use PCMs?

Phase change materials are unique in that they provide a completely passive thermal regulation system. In other words, no electricity or power of any kind is necessary to create a real reduction or increase in temperature. In addition, PCMs have the advantage that they can be used over and over again.

What does this mean to the user? It means:

● Substantial energy savings to owners when used in the construction of buildings and structures.
● Small electronic devices, such as laptops and smart phones, can be cooled where space for active cooling systems such as fans is not available.
● High performance textiles can and have been developed that can provide thermal regulation in such diverse areas as active wear apparel, hospital linens, outdoor gear, infant car seats, etc.
● A better night's sleep through thermally regulated mattress, pillows, and other bedding products.
● Peace of mind through use of shipping containers that keep pharmaceuticals, vaccines, and food products at the right temperature during transport.
● Cooling and heating relief in remote locations without access to electricity.
● Heat storage and release in conjunction with solar energy systems.

How do PCMs work?

A phase change material absorbs and releases thermal energy in order to maintain a regulated temperature.

When a PCM is in its' solid phase it will absorb heat as the external temperature rises. The temperature of the PCM will mirror the external temperature until the PCM's melt point is reached. When the external temperature reaches the melt point of the PCM, the PCM will begin to melt, i.e. "change phase". During the phase change process the PCM will absorb large amounts of heat with almost no change in temperature. During this time period, the PCM is providing a cooling effect. The amount of time the PCM will provide a cooling effect is determined by the PCM's enthalpy of melting, also called the latent heat of fusion of melting. The enthalpy varies depending on the PCM material itself. In the case of PCMs, the enthalpy is typically measured in Joules/gram. The higher the number of Joules per gram, the longer the PCM will provide a cooling effect.

The reverse cycle occurs as the external temperature cools. The PCM, now in its' liquid phase, can release the heat it absorbed as the external temperature decreases. During this time period, the PCM solidifies and provides a warming effect.