The Ziegler pillow is filled with a high-quality Polish goose down that is noted for its high loft and incredible warmth. Filled with a lower density for a softer feel, perfect for stomach sleepers. The high loft of 850 means this pillow will be cool in the summer and warm in the winter, thus providing a comfortable and supportive sleep every night for many years to come. Encased in a German-woven cotton sateen cover that is down-proof and dust mite-proof. A sealed seam construction prevents any down leaking along the edge. Certified Zurguard® hypoallergenic.