The All-Natural Curvy Head Pillow For Side Sleepers (Patented Design) cotton, kapok Made in USA Special Patent-Pending Design allows for relief from ear-pressure All Natural--Cotton and Kapok (natural tree-seed fiber) Very Firm Yet Soft Support---Especially Good for Side Sleepers Use along with The Original Body Pillow for Total Body Comfort (link to Amazon): http://www.amazon.com/gp/product/B0043ERIHC Specially fitted cotton covers sold separately (link to Amazon): http://www.amazon.com/The-Curvy-Headpillow-Cover-Pending/dp/B001M2ZRTO/ref=sr_1_4?s=home-garden&ie=UTF8&qid=1391098860&sr=1-4