Is it okay to ship a bundle of clothing with fragrance free laundry detergent sheets?

This may seem like a totally stupid question but couldn't find answers pertaining to my situation. Not going to risk sending it with the soap sheets to be safe but was wondering what the community thinks of doing it? For context I sold delicate pieces and wanted to leave it to the buyer to wash (they were fine with that option) but it might be best honestly to handwash them myself just to be safe. But is something like that even legal? To send the sheets with clothing.