The filling is polyester, but it seems to be very easy to put on and warm, and we used it often ☺︎ I've shown the stains in the 7th, 8th, and 9th photos. In my opinion, they are not very noticeable, but please refrain from purchasing if you are concerned or are very particular. There is also some wear and tear on the button area. I will compress it for shipping ☺︎ gap 3 years Down vest Jumper Outerwear Gap