What makes a firm mattress firm?
Jul 10, 2010 2:54 PM
Joined: Jul 10, 2010
Points: 1
It's obvious that different people and companies have different ideas of what firm means. 

Even a mattress you lay on in the store may feel "firm" but then two month later it's sagging.

So I was wondering what makes a firm mattress firm. Is it number of coils? Thickness of coils?

Thanks.