Reflex foam reacts to your weight and movement providing a good level of comfort and support at 20cm deep it is a very durable mattress and offers a comfortable but firm sleeping surfacer the 20cm deep king size price buster pedic foam mattress is hypoallergenic and antibacterial and also inhibits the development of dust mites creating a perfect sleep environment for sufferers of allergies and asthmar reflex foam mattresses feature open cell technology allowing the mattress to breathe whi