This is a set of two swaddles. Please check the photos for some yellowing around the hands and neck. I used the M size from when my baby was a newborn so they could wear it for a long time. I put my baby in them every day for sleeping. It might depend on the baby, but it was a great item that helped my baby sleep well. Basically, I hand wash all of my children's clothes before putting them in the washing machine, so I take good care of them. However, there may still be some stains that I couldn't remove, so please purchase only if you understand that these are used items. Returns and complaints are not accepted. Thank you.