This Junior fibre corovin safety mattress is made with a high-density polyester pad to comply with Government Regulations of Ignition and comes with all the relevant BS standards! It is free from antimony, phosphorous, or arsenic fire retardant chemicals. Always ensure a good close fit of the mattress in the cot. Air all bedding, in particular the mattress, as frequently as possible. Mattresses are breathed through. The cover is fully overlocked and is made from corovin fabric. Also, the cover can easily be removed for washing by means of a zip. Hand wash or gentle machine wash (maximum 60 degrees) in a mild detergent and rinse thoroughly. It is recommended that you turn your mattress frequently.