Descripción del material Mattress Full Bed Hypoallergenic Down Dureza: relativamente dura (frontal) Moderado (espalda) Fibra de coco 1.3E + Bolsa de resorte independiente Tela transpirable alemana 2.3D 3.3E fibra de coco de Malasia 4.Espuma muy elástica 5.Tejido de nailon moldeado 6.algodón PK duro 7.bolsa de resorte independiente 8.algodón PK duro Tejido transpirable alemán 9.3D Este colchón Soft & hard de doble propósito (aproximadamente 24 cm de grosor) Feature: Applicable for whole family. As the one side is soft and the other side is hard, so that child can sleep on the back of mattress to protect vertebra, and the adult can sleep on the front. Soft and hard, double sides, more options for your good sleep.