The Pure Sleep Therapeutic 150 crib and toddler bed mattress has an increased coil count of 150 which means the coils are closer together to provide a firmer foundation. The full support wrap provides a firm foundation so baby doesnt feel the coils and stays comfortable and supported for years. The embossed reinforced waterproof cover is hypoallergenic and designed with waterproof binding so the entire surface can be cleaned with soap and water. The natural airflow pocket keeps the mattress fresh without the use of small metal vents. Features: Built with a 150 heavy gauge coils interwoven for durability and support. Thick hypoallergenic all-around border wire keeps the sides and corners firm just like an adult mattress. Firm non allergenic sleeping surface. Perma-dri cover wipes clean with a damp cloth. Mattress also fits toddler bed frames. Ten year warranty on workmanship and materials. Entire mattress is phthalate / flammability compliant and does not contain toxic fire retardants.