Natural cedar wood shoe trees. Perfect for maintaining shoe shape. These help with moisture that cause smell in shoes, and will last you a lifetime! A quick yearly surface sanding (lightly) to remove the dirt and all, will enhance the cedar. Use a fine grit 200 or higher sandpaper. Also, if your caught in a really bad rainstorm, place these shoe trees in your shoes, and it'll help with absorbing moisture and keeping the shoe shaped.