In terms of improving sleep quality, the Eight Sleep Mattress Pad is hands-down one of my favorite new discoveries of 2020. This temperature-controlling mattress pad far exceeded my expectations with all of its bells and whistles, including sleep tracking and a built-in alarm function. Plus the unit itself is sexy as hell — much smaller and quieter than the Chilipad –and yet the mattress gets just as cold, with temperatures ranging from 55°-110°F.