Hard orthopedic round mattress. The base of the mattress consists of a "Bonnell" spring block. Coconut fiber gives the mattress firmness and orthopedic hardness. The natural, unique properties of coconut fiber - rigidity and high wear resistance - prolong the operation of the mattress. Meets all orthopedic requirements. Special ecologically clean additives prevent dust and parasites from entering the mattress. Winter-Summer.