Your baby will curl-up in comfort on the Twinkle Spring Coil Crib & Toddler Mattress by Dream On Me. Constructed with quality materials and workmanship the Dream On Me Twinkle Spring Coil crib mattress offers 88 durable interwoven heat tempered steel coils providing supreme comfort to support growing bones. The Dream On Me Twinkle Spring Coil Mattress has an antibacterial waterproof lock stitched binding that helps prevent mold mildew and odor from seeping inside like cotton binding allows. While the airflow pocket helps keep the crib mattress fresh the reinforced- waterproof cover and binding resist liquids and stains. The mattress wipes clean with mild soap and water. It also passed the 16 CFR 1632 /1633 Federal Flammability tests lead and toxicity tests. Safety is our priority so the Dream on Me Twilight Mattress is Greenguard Gold Certified and JPMA Certified while meeting/exceeding the ASTM safety standards.