The Sealy Breathable Cotton Mini Crib Mattress is a portable crib mattress perfectly sized to fit popular mini cribs that accommodate 38 x24 for a snug fit. Made with a two inch thick extra firm airy core. A durable woven cotton fabric top cover offers breathability on baby’s skin and is more natural next to baby’s skin. A pvc-free waterproof barrier on the underside ensures the mini crib mattress does not allow liquids to seep inside to cause mildew or odors. The mini crib mattress can be flipped for use on either side safely. There is no polyurethane foam no latex foam and no hard plastic noodle weave polyethylene foam. Instead a light and airy fiber is spun together made with sustainably responsible materials creating a hypoallergenic friendlier core. The crib mattress is GREENGUARD GOLD Certified for Air Quality and passes CPSIA and ASTM crib mattress safety tests. No lead or phthalates or levels of harsh VOCs that emit into the air around your sleeping baby. Tested for a snug fit in popular mini cribs. Square corners for a snug fit. Weighs only 3.6 lb and can travel easily. Tested to high quality standard does not use any chemical flame retardants like traditional memory foam and polyurethane foam mattresses do. Crib mattress tested for suffocation risks and built for safety quality and lasting durability. More babies sleep on a Sealy Baby crib mattress featuring decades of trusted baby crib mattresses.