2-Stage Waterproof Rectangular Mattress are a 2 in 1 full-size foam mattress that offers you the freedom of choice and is the answer to your baby's comfort and support which includes a breathing flow technology. The hypoallergenic, antibacterial, CertiPUR-US certified layers mattress is covered with a breath-flow material on the infant side and a waterproof cover on the toddler side with lock stitch seams. Dream On Me Lavender Breathable Core 6" Crib and Toddler Mattress meets the Federal Flammability Lavender Breathable Core 6" Crib and Toddler Mattress is tested for phthalate and lead and constructed with quality materials and workmanship.