You'll love this flat mattress pad, designed for a perfect fit beneath your QuickZip Crib Sheet - and organic!  It includes two layers of organic cotton flannel - top and bottom with an ultra-thin waterproof membrane in the center. Features DrySleep™ technology, which effectively blocks liquids from passing through while still allowing the fabric to “breathe.” Some water vapor is allowed to escape resulting in less “sweaty backs” and a drier, more comfortable sleep.  Provides a soft, non-sweaty and comfortable waterproof barrier (as compared to vinyl and rubber).  Also blocks dust-mites and other allergens.    Highly absorptive and extra soft; reduces uneven temperatures, sweating, and clamminess; no vinyl/PVC, phthalates, or latex (for allergy concerns);  GREENGUARD® Certified; machine wash & dry, made in U.S.A.; 28" X 52".