The Baby Elegance Breather-Dry mattress collection combines a waterproof inner cover with superior breathability removable washable outer cover. Due to the design of this mattress it allows you to wipe down the inner cover keeping the core dry and hygienic should your little one have any mishaps through the night. Waterproof inner cover Super hygienic Fully breathable removable outer cover Honeycomb technology for superior airflow Cover machine washable at 30 degrees