As someone who shares this bed with my boyfriend, whose body temperature could best be described as “like sticking your hand into a crackling fire,” a cooling component to our shared mattress seemed to fall somewhere between a good idea and a medical necessity. However, as a perpetually freezing person who likes to sleep in a freezing room with too many blankets (three thick comforters and a faux fur throw, to be exact), I found that the GelFlex Grid didn’t keep me too cool or have an unpleasant, cold-to-the-touch feel to it. Instead, it seems to largely eliminate hot spots during sleep — you know, the perpetual “I need to turn this pillow over a million times” feeling but in XL format. The GelFlex Grid is supported by layers of Edge Support Foam and Ultra Comfort Foam, under which is a layer of coils running from edge to edge, giving it a comfortably supportive feel but not a “why would someone make a bed out of 2 x 4s” one.