I tried a mattress that claims to be 12 times cooler than memory foam — it’s like the cold side of the pillow

I INITIALLY tested the iGel mattress for Sun Shopping a couple of years ago, and I was blown away by its futuristic temperature control features. However, I also liked how defiantly old-school it was, in a world of bed-in-a-box brands. The model we initially tested, the 1600i, is now unfortunately out of circulation, so I’ve…