Amazon.com : Babyletto Pure Core 4" Midi Crib Mattress, Hybrid Babyletto Pure Core Crib Mattress w Hybrid Quilted Waterproof Cover Babyletto Gelato White & Washed Natural Wood 4 in 1 Convertible Mini Shop Babyletto West Coast Kids Babyletto Pure Core Crib Mattress w Hybrid Quilted Waterproof Cover Kids & Baby Bedding Essentials The Company Store. Replacement cover. All Pure Mattress bundles come with an original cover. Waterproof cover made of non crinkly fabric Sized for full size crib mattresses This is a replacement cover for the mattress cover included with: Pure Core with Dry Cover mattress bundle (M5322BB) Coco Core with Dry Cover mattress bundle (M5326BB) Materials: Face: 100% Polyester (PET); Back: 100% Food Grade Polyethylene; Band: Elastic Country of origin: Taiwan (R. O. C.)