I'm selling a set of four long-sleeved undershirts purchased from Birthday. The top two are thin long sleeves, and the bottom two are made of warm material. As shown in the photos, there is some pilling around the neck. They were worn, so the necklines may be slightly stretched, but I couldn't find any stains. I'm selling them because my child has outgrown them. If anyone is interested, please take a look!