Blue Lives Matter Shirt - Thin Blue Line Support Police 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 Support our Police Officers, Cops, & Law Enforcement Thin Blue Line Shirt, Blue Lives Matter Lightweight, Classic fit, Double-needle sleeve and bottom hem