The 5 Inch Plush Coil Innerspring Waterproof Crib Mattress Made In USA introduces a breathe flow technology. Their mattress is designed to fit standard full size cribs it features a 80 durable . interwoven . heat tempered . steel coils providing supreme comfort .hypo-allergenic . certipur-us certified layer for comfort these mattress are covered with a breathe flow material on the infant side and a waterproof cover on the toddler side with lock stitch seams. Meets the federal flammability standard. Rest easy knowing this mattress is tested for phthalate and lead and constructed with quality materials. This mattress has 2 Hypo-allergenic layers offer cushioned comfort for infants and toddler. Reinforced- waterproof cover and binding resist liquids and stains. Breathable mattress cover. promotes airflow. Laboratory tested for air/water vapor permeability. Safety Advice: please ensure mattress covers or fitted sheets are not too tight or loose over a crib mattress to practices safe sleeping