The luxurious breasley uno memory pocket 1000 mattress is made up of 1000 foam encased pocket springs with a 50mm top layer of zoned memory foam and a high density support foam baseindividual pocket springs work independently to provide support and even pressure distribution as you sleep the springs are encased in high density foam giving edge to edge support and maximising the sleeping surfacea top layer of pressure relieving memory foam has zoned areas for added comfort and support in all