Soft and comfortable, pure cotton muslin is the perfect choice for baby’s first bedding. Its breathable open weave offers year-round comfort: It’s warm in winter and cool in summer. Australian aden + anais have used it to create this essential crib sheet, which is designed for a safe tailored fit. Not only is it machine washable, it gets softer with every wash. 100% cotton. Fits standard crib mattress up to 52" x 28” x 8".