I bought this in advance, fearing my baby would outgrow the S size I was using. However, my baby started sleeping without a swaddle, so I never ended up using this. When I purchased it, the seller confirmed: "I bought this in 2022 and it's been stored in the closet. I think I used it about 10 times. I don't see any stains, and the zipper works fine." I was satisfied because it was in a clean condition without any yellowing. There might be a few small pills around the neck, but it's barely noticeable. Please check the photos. - Brand: Love to Dream - Model Name: SWADDLE UP - Size: M - Material: Cotton - Color: Gray and white stripes