Tri Mom - Triathlete Swim. Bike. Run. 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 Makes a Great Gift for Triathletes. Custom T-Shirt Designed in Detroit. Lightweight, Classic fit, Double-needle sleeve and bottom hem