King Size Ice Cooling Memory Foam Mattress Topper: A king-size ice cooling gel memory foam mattress topper is made to fit a king-size bed while providing the enhanced cooling benefits of ice cooling technology. These toppers often have a layer of memory foam that has been infused with cooling gel or gel beads to relieve pressure and manage temperature where needed. For larger bed sizes, the ice-chilling effect provides a cold, comfortable sleeping surface by preventing heat buildup.