The mattress is made with individual adaptable pocket springs for tailored support. There are also 2 types of nursery foam; one for babies and one for toddlers - you simply need to turn the mattress over. The removable washable cover is made from TENCEL fibres and treated with Purotex anti-allergy protection. Purotex is a revolutionary technology based on microcapsules filled with natural probiotics. These probiotics areEasy-clean cover for a happy, healthy child 100% natural and organic. Tests and scientific studies prove that Purotex® improves allergy symptoms by reducing house dust mite allergens by 93.7%, cat hair allergens by 92.8% and dog hair allergens by 66.7%.