The rash guard and pants were purchased at Akachan Honpo in 2025. They were only used a few times this summer. There appear to be no stains or pilling. The swim pants were used with diapers, so they were not used directly. Also, these swim pants seem to have a function similar to diapers. The leggings were purchased on Rakuten. They were used at a water play area in a park and a wading pool, and some sand got mixed in. There are black specks in the fabric that won't come out, but they are not noticeable unless you look closely. The leggings are a bit slim, so I purchased size 100cm. They were a little long for a child around 80cm tall, but there were no problems with the fit. Both items have been washed. Please comment if you have any other questions.