The technicality of this mattress lies in its core of high resilience micro-alveolate foam. HR foam offers resistance proportional to body weight for an ideal balance of the spine and muscles.Highly appreciated in baby bedding, high resilience foam has the particularity of being soft while offering firm and distributed support. It has microalveoli offering a structure combining lightness and resistance.This technical material withstands the test of time very well and your baby will spend many years enjoying a good night's sleep.Characteristics: Composition: 75% polyester, 25% polyurethane viscose. Foam core HR 55kg/m3. Polyurethane foam bands 20kg/m3. Thickness: 11 cm. Removable.Dimensions: 120x60x11 cm. Weight: 2.55 kg. Package dimensions: 120x60x11 cm. Package weight: 2.90 kg. Care instructions: Wash at 30° C