This Thermorest cotbed mattress provides a comfortable supportive surface with microcapsules in the mattress to help regulate body temperature for baby. Ensures excellent support and comfort for your child.Latest Thermorest Nano technology regulates body temperature using microcapsules which change state to maintain ideal sleeping conditions. Permex Plus PVC-free hypoallergenic, waterproof, breathable layer, allows air and vapour through, keeping baby dry and cool.Babies R Us are donating £