Combined orthopedic round mattress, which has two sides of different quality . It is two mattresses in one and you can change the mattress prison by simply turning it to the other side. The base of the mattress consists of a "Bonnell" spring block, a medium-hard filling - seaweed and a hard one - coconut fiber board. The natural properties of sea grass allow you to keep cool in summer. Coconut fiber gives the mattress firmness and orthopedic hardness. Meets all orthopedic requirements. Special ecological additives prevent dust and parasites from entering the mattress. Winter-Summer.