YONEX STB-1001 fitness training shirt, size M, black. - Brand: YONEX - Model Name: STB-1001 - Size: M - Color: Black - Features: Fitness model Thank you for viewing. I am selling this because I accidentally purchased the wrong size. I have opened it once and unfolded it, but it is unused. I have not washed it. I have put it back in the packaging bag as closely as possible to how it was when I bought it, but since I am not a professional, it may not be folded neatly. Please purchase only if you understand this. The size corresponds to UNI's M size, so please refer to the size chart. Size: M