Eight Sleep Pod 3 Cover

The thermostat for your bed: Eight Sleep's Pod 3 Cover fits over your existing mattress and uses water-based temperature control to cool or warm each side independently from 55 to 110 degrees Fahrenheit. It tracks your sleep stages in real time and automatically adjusts temperature throughout the night — cooling you during deep sleep, warming you before wake-up — and delivers heart rate, HRV, respiratory rate, and sleep stages without wearing anything. At $2,049 for a queen, it's obscenely expensive, but people who run hot while sleeping call it the only product that actually fixed their wake-ups, with a 40% reduction in night-time awakenings reported versus the Bearaby Cotton Napper's 50% insomnia severity reduction. The data is genuinely useful, measuring 99% accuracy on sleep stage detection compared to polysomnography.