I Wear Grey For My Dad Brain Cancer 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 No matter if you spell it grey or gray, you're covered with this brain tumor awareness tee by FSG. Lightweight, Classic fit, Double-needle sleeve and bottom hem