Zip-Off, Washable, 3D Quilted, Breathable mesh cover for maximum airflow.  WATERPROOF underlayment on one side. Designed specifically to fit Moonlight's AIR Crib Mattress. 

Our Air crib mattress cover is UL GREENGUARD® GOLD certified. The +2-Stage Infant and Toddler cover adds a completely waterproof, yet breathable, lining on the toddler side to provide maximum protection.