Give your baby the gift of natural, peaceful sleep with the Baby Steps Organic Cotton and Wool Crib Mattress. This breathable mattress is the softest of the Baby Steps crib mattresses, featuring layers of organic cotton fill wrapped with wool and Euro-tufted to an organic cotton ticking cover. Wool is an ideal mattress material as it is naturally hypoallergenic, resistant to dust mites, and responsive to your baby’s fluctuating temperature.