100% Cotton.
It is ideal for sleeping, cuddle time, nursing, burping, changing, tummy time, playtime, and more! Its features include an open weave that is lightweight and breathable, helping to regulate body temperature while also providing warmth and comfort.Machine wash cold. The MiracleWare(R) Muslin swaddle 2 pack encourages your baby's sweet lullaby in this luxuriously soft, oversized, multi-use blanket. Muslin cotton is perhaps one of the most wholesome, natural, and gentle fabrics around, making it a desirable choice for your baby.