Mens Autism Awareness Shirt Worlds Greatest Grandpa TShirt 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 Autism Awareness Shirt, autism shirt ribbon t-shirts, autism shirt mens Worlds Greatest Autism Grandpa TShirt Lightweight, Classic fit, Double-needle sleeve and bottom hem