Level 4

Level Four mattresses feature individually wrapped coils, foam encasement, and, depending on the model, may feature memory foam, gel, cooling agents, specialty bedding, and latex. Some of the brands included at this level are Serta® iComfort® (entry models), Serta® iComfort® Hybrid (tight top), Sealy® Optimum® (entry models), Stearns & Foster® (Signature series), Beautyrest® Ultra®, and Beautyrest® World Class®.