The Bundle of Dreams Organic Eco-Air 5" Crib Mattress boasts an Organic Cotton cover that is water-repellent, removable, and machine washable. This innovative mattress is 100% Breathable and features a design that promotes temperature regulation by allowing optimal airflow. Additionally, it is free of harmful VOCs, off-gassing, and toxic emissions. Its firm construction is specifically engineered to provide optimal support for infants. All materials used in its production are eco-friendly, hypoallergenic, and promote breathability.