Memory foam lessens a lot of body heat and relieves you from an uncomfortably hot night sleep. The discomfort at night may diminish the amount of sleep and leave you poorly rested. You can’t change the temperature of the mattress or the amount of body heat it alleviates, but you can optimize your sleep surface with the help of a topper or mattress pad. You can even invest in pillows and sheets to keep you cool and adjust temperatures in your bedroom.