This infant mattress is made from lightweight fibers your little one will love and fits perfectly in the Shnuggle Bedside Crib (which is sold separately). It promotes airflow and provides a comfortable sleep space for baby. Its hypoallergenic-fiber core is more breathable than standard foam mattresses and includes a quilted cover for added comfort. This mattress is water-resistant and foldable to allow for easy storage until baby is ready to move to the full-size crib. The quilted cover can be easily removed and washed, and won't discolor over time. The outer shell is made from water-repellent quilted polyester, and the inner is made from polyester wadding with a high-breathability polyester-fiber matrix. 47.2" x 23.6" x 2.8" Requires the Shnuggle Air Bedside Sleeper Infant Crib and Shnuggle Air Full Size Crib Conversion Kit (sold separately) Polyester cover Hand wash, line dry Imported Kids' Wear