Ice Cooling Gel Mattress Toppers for Hot Sleepers: Ice cooling gel memory foam mattress toppers are a specific type of cooling topper that uses a gel-injected material with improved cooling properties. These toppers, intended for overheated sleepers, provide an even stronger cooling effect. These toppers have gel-infused foam or gel beads that absorb and release body heat, giving you a cool, refreshing surface for a comfortable night's sleep even on the hottest nights.