Our coolmax fibre mattresses are designed using ultra strong anti allergy fibre pads with a coolmax layer to help optimise airflow and keep baby at the correct temperature while sleepingthe coolmax technology is designed using a honeycomb effect to create a cushion of air under the baby complete with asecondary inner cover allowing you to wash the outer and continue to use the innerwhy choose mecoolmax technology optimises air flow to babyremovable and washable coverfully breathablelong last