This Dream On Me, Breathable 4-inch Full-Size Foam Standard Crib & Toddler Mattress ( Model # BR-1A4) comes with a breathe flow technology. Breathable 4-inch Full-Size Foam Standard Crib & Toddler Mattress ( Model # BR-1A4) is designed to fit standard full-size cribs it features supreme comfort, a hypo-allergenic, CertiPUR-US certified layer for comfort these mattresses are covered with a breath–flow material on the infant side and a waterproof cover on the toddler side with lock stitch seams. Breathable 4-inch Full-Size Foam Standard Crib & Toddler Mattress ( Model # BR-1A4) meets the Federal Flammability Standard,rest easy knowing this mattress is tested for phthalate and lead and is constructed with quality materials and workmanship in the USA.