I bought this at Akachan Honpo as thermal underwear for the dead of winter and wore it on days we went out. The size is 80. The green underwear is thin and size 70, but it's a roomy fit, so I wore it when my child was wearing size 80 underwear. There are no stains or marks, but the white material around the neck has some pilling. It's been worn, but I think it can still be used. How about it as a spare? The tag has been cut off because I wrote the name on it. I will sell it to someone who understands that it has been worn.