[FIRM SUPPORT] -- 150 heavy gauge steel coils for firm support while your baby sleeps and grows. Firm non-allergenic sleeping surface for best quality sleep. [WATERPROOF & BREATHABLE COVER] -- Waterproof cover and lock-stitched waterproof binding resists stains, moisture and mildew. The entire mattress wipes clean with a damp cloth for a sanitary sleeping surface. Perma-Dri cover wipes clean with a damp cloth. [SAFETY & QUALITY TESTED] -- This entire mattress is GREENGUARD Gold certified for indoor air quality and low chemical emissions to help create a healthier sleeping environment for your baby. The entire mattress is phthalate and flammability compliant and does not contain toxic fire retardants. [MADE IN USA] -- Made in the USA and offers a 10-year warranty on workmanship and materials. [FITS CRIBS & TODDLER BEDS] -- Mattress measures 51.63” (Length) x 27.25’ (Width) x 5” (Height) and fits both USA standard size cribs and toddler beds. [MANUFACTURER NOTE] -- As the manufacturer, Kolcraft stands behind all our products with great customer service and support. If there is anything we can do to help you, please let us know.