Subjects spent consecutive nights in controlled environmental chambers with continuous polysomnography and 16-point in-bed microclimate sensor logging.
Environmental engineers placed 16 healthy adults inside a climate-controlled sleep lab with thermal sensor arrays placed between their body and mattress to track real-time microclimate conditions.
Allows convective airflow through coil chambers, dissipating body heat and preventing humidity condensation.
Acts as a thermal insulator, trapping body heat against the skin and triggering cardiac rate spikes.
When in-bed microclimate temperature exceeded 34.5 degrees Celsius and relative humidity rose past 65%, deep slow-wave sleep (Stage N3) dropped by 18% due to thermoregulatory micro-arousals.
If you wake up sweating or kicking off blankets, your mattress is trapping heat. Open-coil innersprings, natural latex, and breathable organic covers maintain the 32 to 34 degree Celsius microclimate needed for deep restorative sleep.
Recommended Firmness Target: Medium to Medium-Firm with Cooling Features
Hot sleepers should avoid thick solid foam blocks. Prioritize innerspring hybrids with open-cell latex, phase-change materials, or breathable wool covers.