Rest effortlessly on this California king mattress from Tempur-Pedic, designed with a medium-firm feel. The ventilated material provides consistent airflow and pressure relief. The Tempur-Ergo ProSmart Air Base uses specially designed fans to quietly circulate cool or warm air directly from the base and up through the mattress for all-night comfort, and must be paired with the Tempur Active Breeze mattress to enjoy full climate control benefits.