Uniqlo's Ultra Warm Heattech Crew Neck T-shirt. I am selling this because I haven't had a chance to wear it. I've worn it less than 5 times, and while there are no noticeable stains, there is some pilling and wear due to the nature of the material. Please understand that this is a used item before purchasing. The size is L. It will be shipped via Yu-Packet Post with simple packaging. Thank you for your understanding.