Funny T-shirt - World's Okayest Sister 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 Funny T-shirt - World's Okayest Sister World's Okayest Sister Lightweight, Classic fit, Double-needle sleeve and bottom hem