Our thick felt soles with a hand-applied latex for a little bit of grip and the same punched holes you'll find on all our soles. Ideal for all D.I.Y. slippers for adding a layer of cushioning and insulation to any slipper project. These felt slipper bottoms are also great on your hand-knitted socks. Minimum 90% wool. If you're making a pair of our adult's felt slippers you'll want: - 1 pair tops to go over your feet - 2 pairs felt soles; one for your insole (the top layer next to your foot) and