This is a Uniqlo Heattech in size S. I wore it once, but the size didn't fit, so I washed it and stored it at home. It's size S, but the child who usually wears 160 said it was too tight, so I'm listing it for a child who wears 150. Size: S Bust 77-83cm Pilling occurred after one wash, and while it looks used, the fabric hasn't stretched and is still in good condition. I've only worn it once, but there are three small holes on the left back near the waist. I don't think it will fray, but please be aware of this (see the last image).