Warm & Natural Cotton Batting, Crib Size 45" x 60": * This 100% USA grown cotton is punched with hundreds of needles through a thin base material (polymer fibers) to prevent tearing, shifting, migrating, or creeping through the cover fabric, making it 87.5% cotton/12.5% polymer fibers * Needled cotton"s flexibility makes it ideal for both inside and outside use * Fibers are held together without glue so a quilting needle glides easily through the batting * What an incredible difference * No need to pre-wash, machine washable after quilted, can be used as an exterior fabric, quilt up to 10" apart, easily dyes and your fabric will cling to the batting while quilting