Wooden (red cedar) shoe trees. I bought these new in January 2019 and used them for a while, but I started to think the heel size was a little too big for my shoes, so I haven't used them for the last year or two. There is a stain on the right shoe tree, on the side where the big toe would be (see the second photo). Applicable size: 24.5 - 26.5 cm. See the 7th photo for details.