Sleepers who enjoy sleeping cooler on a hybrid mattress that blends traditional springs with memory foam layers will love the Polaris Mattress. The Polaris ActivAir Mattress combines plush, ultra-breathable ActivAir foam, cooling CoolSync memory foam, and zoned pocket coils for targeted support. Tying everything together is the HyperChill cover, which offers an instant cooling effect. All Malouf mattresses arrive rolled and compressed in a box.