Purchased over 10 years ago, likely from the official online shop. It's been kept in storage, but I'm selling it because it's too small. The material and design allow it to be worn as either an inner or outer layer. * It has a very tight fit, like a leotard, so it may be difficult to wear for those who are overweight or have increased muscle mass. * It shows some signs of wear. Simple black undershirt - Style: STYLE#1107382 - Size: S/M (US/JP) - Material: 95% Polyester, 5% Polyurethane (Geoline) Thank you for looking.