Elexonic Custom Products : Biohazard T-Shirt Big Logo 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 biohazard,warning,Biological hazards,virus,toxin,bacteria,virus, Biological hazards, also known as biohazards, refer to biological substances that pose a threat to the health of living organisms, primarily that of humans. Lightweight, Classic fit, Double-needle sleeve and bottom hem