With the iComfort by SertaÂ® mattress, cool, supportive sleep is the priority. Weâ€™ve specifically designed this mattress to keep even the warmest sleepers cool. With iComfort, multi-layered mattress-cooling foam technology adds support, resilience, and temperature regulation for the coolest, most comfortable sleep ever. You donâ€™t have to be a hot sleeper to love iComfort. You just have to like your sleep environment to be refreshingly comfy.