This is a Montbell Merino Wool Action T-shirt, men's size M, product number 1104683, retail price around 5500 yen. I used it for hiking and cycling, as well as for everyday cold protection. Compared to Heattech, it felt very warm, and I didn't get cold from sweat easily, so it was very useful in the cold season. I am selling it to organize my winter clothing. When washing, I put it in a double net and handled it with care to prevent damage. Due to the nature of merino wool, there may be some pilling or snags. I prioritize its functionality as an inner layer, so please consider purchasing only if you don't mind. Please refrain from price negotiations. Please read my profile before purchasing (^^) Size...M