The covers of the original Theraline pillow are made from exceptionally soft and high-quality cotton. Mercerization and the particularly colorfast reactive printing give it a fine sheen. All fabrics used by Theraline are solidly and precisely crafted, pre-shrunk, and thus meet the highest durability standards. Of course, all fabrics and colors comply with the Ökotex Standard 100 criteria and are free from harmful substances.