Add Yahoo as a preferred source to see more of our stories on Google. 3Z Brands/CNET Not all memory foam mattresses are created equally. Some are softer, while others are dense and supportive.

A few of my fellow CNET mattress experts and I got a behind-the-scenes look at a mattress factory's secret foam-pouring process, and here's what we found. Caroline Igo (she/her/hers) was a wellness ...