When I hit 70 I started waking up with mild hip and shoulder aches that seemed related to my mainly side-sleeping position. When I decided to replace my mattress I looked for something that wouldn’t heat me up, as sleeping hot means not sleeping for me. I’m very pleased to say that my Aurora Luxe Cooling mattress not only doesn’t heat me up it actually feels cool - but not cold. By the third night on the mattress - placed over my old box springs) my wake-up aches were gone! I’m very pleased overall, but still wondering if a soft (vs. my medium) would be even more comfy. Since I sometimes sleep on my stomach I choose medium to be on the safe side.