The extra super firm sleepeezee ultrafirm 1600 mattress has pocket springs and a firm cotton mix along with a hand tufted cover it is well suited to larger body frames or those who enjoy or require a firm mattress for a back problemthe ultrafirm 1600 mattress springs are made with 30 recycled steel and has 1600 single layer extra firm pocketed springs in a king size mattress along with natural cotton blended fillings and firm durable polyester layers on both sides of the mattress to help give th