100% cotton. There is no noticeable damage. I think it's in relatively good condition. I haven't tried it, but apparently Uniqlo is also resistant to tumble dryers! I have checked everything and will note any major damage, but there is a possibility of minor oversights. Please understand that these are hand-me-downs, and I would appreciate it if those who don't mind minor imperfections would purchase them. I do not have any pets, and I do not smoke. Please comment if you would like measurements. I also have other children's clothes and goods for sale. I offer a discount for bulk purchases, so please use the bulk purchase function or comment before purchasing! I would be very happy if these items, which are still wearable, could be passed on and utilized. I will strive to make transactions pleasant, so thank you for your cooperation (^^) [Regarding the names of baby clothes] The definition of baby clothes names is ambiguous, and I have listed various names, but I would appreciate it if you could judge the exact shape from the photos. Search terms: Rompers, coveralls, pre-alls, boys, girls, girl, boy