Compression set

Compression set or Compression resistance

For foam products in shoe manufacture we like to know how long foam will last if we build it into a footbed or shoe midsole.  Simply put the compression set is how much a foam will bounce back after being compressed.  Compression set is measured in a Percentage.  A foam that resists compression could have a score of 4%, a foam that is badly damaged by impact may have a score of 45%.
Poor quality EVA will have a high compression set value.  High quality PU foam will last forever with a very low compression set.  Injection Molded EVA like this shoe will resist compression set.

Does eva foam have a compression set? Yes! Low quality or very soft EVA will have a high compression set. Higher quality EVA will resist compression set,

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