This is a set of three 100% cotton swaddles. My baby slept well when wearing these, so I used them in rotation from the newborn period up to the beginning of 2 months. Therefore, there is a feeling of use, such as fluffing, fabric creasing, and zipper wear. I have not visually confirmed any noticeable stains, but please refrain from purchasing if you are concerned about this. *Regarding Size Notes* Green/Star pattern: S Rainbow pattern: M -> Although it is labeled as M, I personally feel it runs small due to the lack of stretch. I used it from the newborn period, and it fit the same as the other two. *Individual purchases are not allowed. If you'd like to try swaddles, please consider these. Swaddle Up, swaddling blanket, sleep sack