Warm Company 45-Inch by 60-Inch Warm and White Cotton Batting, Crib Size This batting will not separate; bunch or beard 100-percent 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-percent cotton/12.5-percent polymer fibers Needled cotton's flexibility makes it ideal for both inside and outside use