Arnold Chiari Malformation Awareness T Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Arnold Chiari Malformation Awareness T Shirt - Arnold Chiari Malformation Shirt - I Wear Purple For Arnold Chiari Malformation Awareness Shirt - Arnold Chiari Malformation Awareness Shirt For Men, Women, Youth Lightweight, Classic fit, Double-needle sleeve and bottom hem