How durable is a common foam mattress before it starts to soften?

A common foam mattress, such as those from Koala, Eva, or Ecosa, typically begins to soften after about 5 to 7 years of regular use.

Foam mattress durability depends largely on the density and quality of the foam used, with higher-density foams typically lasting longer before softening.

For instance, contemporary Australian brands like Koala, Eva, and Ecosa generally offer foam mattresses with warranties of 10 years or more, but most users notice softening and reduced support after about 5 to 7 years of consistent use.

Regular rotation and the use of a suitable mattress base can help prolong the supportive feel and slow down the softening process.