Sleep Number ClimateCool Named a Top Cooling Mattress
New York – October 16, 2026 -- Hot sleepers who wake up sweaty at 3 a.m. have a new mattress to consider: Expert Consumers has named the Sleep Number ClimateCool a top choice in its review of the best cooling mattresses, citing up to 15 degrees of active cooling on each side of the bed.
Airflow removes heat instead of just feeling cool
The 12-inch ClimateCool moves air through the bed to carry warmth away from the body. Cooling gel layers and breathable materials support that airflow. Many cooling mattresses rely on breathable covers or cooling foams alone, which can make the bed feel cooler but do not keep removing heat as the night goes on, according to the review.