Good: Gentle/Stomach Hypo-allergenic Primaloft , Gentle - Standard, 20x26" 01 Stnd White Hypo allergenic Primaloft is a patented polyester microfiber, the perfect alternative for those who are sensitive to down. non-allergenic and water resistant lifetime guarantee, made in USA Gentle, for stomach sleepers - Standard 20x26 245-Thread Count Twill Shell with Woven Cording