Filled with all-natural Aussie wool and covered in 100%premium cotton.AllNatural no dyes no harsh chemicals no polyurethane no vinyl no phthalates or BPA Provides the warmth of wool combined with the softness of cotton for your baby Easy Care washable in cold water. :https://www.welllivingshop.com/washable-wool-crib-and-small-size-mattress-pads.html