The Naturepedic Organic Cotton Mattress Protector offers a hygienic sleeping surface for your baby while protecting the mattress from spills. It has 2 layers of soft organic flannel with a thread count of 250 to withstand daily wear and tear. Its ultra-thin waterproof barrier at the center uses the DrySleep technology to prevent liquids from penetrating the mattress. Plus, this technology allows the fabric to breathe and water vapor to pass through, reducing sweaty backs, clamminess and uneven surface temperatures. This crib mattress protector is PVC free and hypoallergenic, making it safe for your baby. It resists bacteria, dust mites and other allergens to provide a hygienic sleeping environment. The included mattress pad provides a layer of comfort and warmth. Simply machine-wash this hypoallergenic mattress protector for easy maintenance.