I was having trouble with my child not sleeping, so I purchased this at an authorized retailer. They outgrew it before I could use it much, so it hasn't been worn very often. I thought there might be a stain on the left hand part, so I've included a photo at the end, please take a look. The product is: https://m.lovetree.jp/product/%E3%82%B9%E3%83%AF%E3%83%89%E3%83%AB%E3%82%A2%E3%83%83%E3%83%97-%E3%83%A9%E3%82%A4%E3%83%88-%E6%98%A5%E5%A4%8F%E7%A7%8B%E5%90%91%E3%81%91/19 - Brand: LOVE TO DREAM - Model Name: SWADDLE UP LITE - Size: SMALL - Material: 87% Cotton, 13% Viscose Thank you for looking.