7 Zoned mattress, incorporating latex, allows the combination of these materials to mould to the sleeping body giving total support. The unique revolutionary 7 zone comfort system responds immediately to the body weight, moulding to your individual shape, providing excellent support for a healthy nights sleep. The exclusive Air Flow® System allows air to circulate easily around the mattress which cools the sleeping body on the mattress. Ultra Zone 2500 25mm of Natural Latex 75mm of V50 Memory Foam with 5 Zone support & Air Flow® Technology 150mm of reflex 300 with head to foot airflow.