Heat Packs

Cryophase’s instant heat packs run on an exothermic oxidation reaction rather than stored heat — open the package, expose the contents to air, and the reaction begins generating warmth immediately. No microwave, no boiling water, no pre-treatment delay. The formulation is built from 100% natural ingredients and is tuned across several variants to reach up to 60°C, holding an average of 50°C for up to 12 hours depending on the specific pack.

That sustained output profile is why our 12-hour instant heat packs have been adopted by defence forces in European countries for keeping personnel warm in extreme cold-weather conditions — a use case with very little tolerance for inconsistent heat output.

An adhesive-backed variant is built for spot treatment of muscle pain and minor ligament injuries, and the format has been recommended by physiotherapists internationally as a genuinely non-medicated pain relief option. Compared to older click-style heat packs — which require boiling, controlled cooling, and careful handling before skin contact is safe — this is a simpler reaction with a built-in ceiling: the formulation is calibrated to a 70°C maximum, which sits within a safe comfort range for most adults, though it’s not recommended for use with babies given their lower heat tolerance.

At 13cm x 9cm, the pack footprint is large enough to deliver real coverage for pain relief while staying compact enough to carry in a pocket — for a cold-morning jog, a day in the snow, or simply mowing the lawn or washing the car when the temperature doesn’t cooperate.

We also manufacture a specialised variant calibrated precisely to 38°C for pathology lab applications, designed to hold that exact temperature during cold agglutinin (coldag) and cryoglobulin testing — a use case where ±1°C actually matters.

If your application calls for a heat or cold formulation calibrated to a temperature or duration outside our current range, get in touch. Formulation development for both heating and cooling applications is ongoing.