The 4 Layer Deluxe Muslin quilts are made with 4-layer 100% rayon, made with bamboo. This deluxe muslin fabric is breathable with a natural, open weave and softer than almost any fabric. Perfect for any time with your little one. The extra layers of muslin give your little one extra warmth while not sacrificing comfort. Our quilts are machine washable and get softer with every wash. The large 47″x47″ size is the ideal size for everyday use.