Knit sweater. Thick and warm. I'm selling it because my child has started to have preferences about clothes and doesn't wear it anymore. There are no food stains. The size is listed as 18M. The last photo is of the child wearing it. It's very cute even with a付け襟 (tsuke-eri - detachable collar) or bib layered on. I will compress it and ship it using the cheapest method. Feel free to ask any questions.