Science is Greater Than Opinion T-Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 65% Cotton, 35% Polyester Imported Machine wash cold with like colors, dry low heat Shipped by Amazon. High Quality Shirt. Lightweight, Classic fit, TearAway label, Double-needle sleeve and bottom hem Science &gt; Opinion Tee with atom design. Atheist 4.5 oz 100% Combed Ringspun Cotton, machine wash cold with like colors, dry low heat