Laybrooks adjustable bed superior sprung mattresses are specifically designed for all types of adjustable beds the spring count depends on the size of the mattress 3ft 4ft 4ft 6 5ft or 6ft as an example a 5ft mattress has over a 1000 springs on top of the springs there are layers of natural fillings this helps stop overheating for those people who sweat a lot in bed all of our mattresses are made for the individual customers weight and how they like the feel soft medium or firm and th