"Sonic Manipulator and VIce Overlord of Vibration" 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 Perfect for an Audio Engineer, Sound Tech, Sound Guy, Sound Mixer Lightweight, Classic fit, Double-needle sleeve and bottom hem