100% Polyester Black The tag has been cut off, but it looks like a men's XL size, perhaps? (Measurements are approximate;) It seems to have a relatively wide width. It appears to have been a commemorative T-shirt for some event. There are some snags on the front of the chest, as shown in the photos. Please be aware of this beforehand. Although there is some wear and tear, I think it can still be used. It seems to be a durable fabric and will probably dry quickly even after washing. How about using it as loungewear? I hope you will feel free to use it. We plan to ship it in eco-friendly packaging.*