GREENGUARD GOLD CERTIFIED: This Greenguard Gold certified crib mattress is tested for over 10,000 chemicals and VOCs and CPSIA compliant. Designed as a breathable crib mattress non toxic, it supports a healthier sleep space for infants and toddlers. BREATHABLE WASHABLE COVER: Soft rayon knit cover feels gentle on baby’s skin and enhances airflow for a baby crib mattress breathable design. Waterproof barrier helps protect the core, and the zip-off cover is machine washable for easy care. TWO STAGE FIRM SUPPORT: Firm crib mattress features an extra firm infant side and a cozier toddler side. Meets ASTM F2933 standards for proper crib fit and firmness to help support safer sleep from newborn stage through toddler years. LIGHTWEIGHT DURABLE CORE: Toddler mattress 52x28 in. size fits standard full-size cribs. USA-made fiber core offers lasting durability with a lightweight build around 8 lb for easier lifting, sheet changes, and everyday handling. SECURE STANDARD FIT: Baby crib mattress measures 52 x 28 in. with square corners for a snug fit in standard cribs and toddler beds. Waterproof surface helps maintain cleanliness and dependable performance night after night.