This is something I used for a while when I strained my neck. Due to age-related deterioration, yellow stains have appeared during storage. If you are concerned about the stains, I think you can use it with a fabric cover. There are soft cushions on the parts that touch your neck and chin, so the areas that touched them did not hurt. You can also remove and wash them when you sweat. I will ship it in a reused Yu-Packet Plus box.