Serta ThermaGel 3" Memory Foam Mattress Topper, California King

Upgrade your California King mattress with the Serta ThermaGel 3-Inch Mattress Topper. Designed to combat sleeping hot and pressure discomfort, this topper features ThermaGel bead technology for targeted cooling and a deep plush feel. The 3-inch foam depth provides substantial contouring support, cushioning key areas like hips, lower back, and shoulders to promote proper spinal alignment and offer back pain relief. Its ventilated, breathable construction enhances airflow for a comfortable night's sleep. Made in the USA with CertiPUR-US certified foam, it's designed for a no-shift fit on standard California King bed frames, platform beds, and adjustable bases, effectively softening a firm mattress and extending its life.