I purchased this last year. It's warm innerwear from Gunze. The fabric is double-layered from the elbows down for extra warmth. From the trusted brand Gunze, you can feel the warmth just by wearing one layer, even on cold days. Personally, I feel it's warmer than Heattech. There is some pilling on the fabric, but I think I've only worn it about 10 times. I don't see any other noticeable stains, but it is a used item, so please understand before purchasing.