The king size price buster memory foam mattress offers amazing value for money as well as providing great comfort and supportr the king size mattress features a 3cm memory foam layer which provides comfort and support to your body throughout the night memory foam helps to alleviate pressure points meaning less tossing and turning during the night resulting in a deeper more restful sleep the memory foam layer sits on a supportive reflex foam base and the mattress has a total depth of 15cm