Rest assured your baby would sleep comfortably on this 2-Stage Waterproof Standard Crib Mattress. Constructed with quality materials and workmanship. This lightweight mattress offers durable, interwoven, heat tempered, steel coils providing supreme comfort and support. A protective polyurethane foam wrap on each side delivers a plush sleeping surface. Features include a hypoallergenic; foam Insulating layer and lock-stitched waterproof binding for lasting durability and a layer of Fire blocker, a blend of fibers that help isolate the impact of a fire and limit its spread. The phthalate and lead-free, triple laminated waterproof cover is stain-resistant to help protect against liquids leaking inside. Wipes clean with mild soap and water. Meets the 16 CFR 1632 /1633 Federal Flammability Standards and carries a 30 days warranty manufacture.