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The Thermal Barrier

Trapped air is the key. Our patented manufacturing process allows us to seal every edge of every pack. We have also developed lightweight yet wide material, which without sealing is weak. Seal the edge however, and the product is transformed, with more air trapped inside.
This trapped air in both tray and lid acts rather like double glazing, restricting the flow of temperature very effectively. Around a pallet of fish packed in a CoolSeal box is a significant wall of trapped air.