The Casper Wave Hybrid Mattress Bed Cushioning is aimed at those who tend to sweat in bed. Instead, it helps you to remain at a cool temperature to avoid waking up throughout the night. This mattress features three layers of breathable foam to allow hot air to escape. It also has added cooling gel so you feel refreshed throughout the night and the following day. But it’s not designed for just hot sleepers. In fact, this mattress uses premium foam..