The Helix is a hybrid mattress of sorts with its 10 - inch foam design that uses three layers of polyfoam and a layer of microcoils to give you great support, no matter which configuration you choose. (businessinsider.com)
Polyfoam Corporation has been one of the nation's leading manufacturers of EPS foam for more than thirty years. (packagingdigest.com)
Polymer - Polyfoam hybrid mattresses tend to be more cooling. (sleepmetro.com)