Warning I May Start Talking About Metal Detecting 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 Warning I May Start Talking About Metal Detecting T-Shirt. Love Metal Detecting? Show off your passion with this shirt! Makes a great gift! Lightweight, Classic fit, Double-needle sleeve and bottom hem