COMPLETE COMFORT FOR BABY: 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. FEATURE-HEAVY: 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. EASY TO MAINTAIN: 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. SAFETY ASSURED: Safety is our priority, so the Dream on Me Twilight Mattress is Greenguard Gold Certified PROD SPECS: Fits all standard size cribs and toddler beds for years of use. Flip and rotate the mattress every 2-3 months. Product dimensions are 52” L X 28” W X 5”H.