HEATTECH Innerwear Extra Warm My child got too hot and only wore it about twice, but I think it has been worn. It was just sitting in the closet. It was stored, so there are fold wrinkles. If you're curious about when it was made, please identify it by the product tag number, etc., to find out how many years ago it was made. Feel free to comment! Only those who understand that this is a used item, please.