‎100% Muslin Cotton [Extra Soft] Made from high quality muslin cotton that is super soft making it comfortable to touch, which is perfect for baby’s delicate skin [Breathable] Muslin fabric stays breathable while keeping your baby warm and cuddly. It provides a comfortable sleeping environment for your baby [Universal Size] Perfectly fit 28" x 52" standard crib mattresses, the thickness of the mattress is up to 7" [Snug Fitted] Featuring an elastic band, easy to put on and take off. The elastic band is 360° full around the edge for a snug, secure fit. Safer for your baby to sleep [Easy to Clean] Machine wash available, gentle cycle on low, do not iron or bleach. No shedding No pilling