This is a MUJI (Mujirushi Ryohin) Gokudankan innerwear T-shirt. Size M, color is gray, crew neck, long sleeve. I wore it once, but I've decided to wear size L, so I'm selling it. Of course, there are no tears or stains, and it's in very clean condition. I'm sorry, but please refrain from price negotiations. Thank you for your consideration.