Vintage World's Greatest Mom T-shirt Mother's day Gift 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 Perfect as a gift for holidays such as a birthday, Christmas, Valentine's day, New Year's, Easter or Halloween costume. Vintage World's Greatest Mom T-shirt Funny T shirt Funny Mother's Day, birthday, holiday or special occasion gift for mom. Lightweight, Classic fit, Double-needle sleeve and bottom hem