This is Uniqlo's HEATTECH ULTRA WARM crew neck. I wore it as an undershirt. There is some wear and tear, such as fading. I wrote my name on the tag, so I cut it off. I am also selling a navy blue version. - Size: 150 - Material: 56% polyester, 40% rayon, 4% polyurethane I have checked the item beforehand, but please forgive any oversights. Please refrain from purchasing if you are concerned or are a perfectionist, as this item was used by a child. Please understand that this is a used item and has been stored at home before purchasing. Please note that the price includes shipping, so I will send it via the cheapest delivery method. It may be folded up small for shipping. Thank you for your understanding.