Pedag 172 Leather Naturally Tanned Sheepskin Insole with Activated Carbon,Pedag 172 Leather Naturally Tanned Sheepskin Insole with Activated Carbon, LEATHER Art. 172: Durable, naturally tanned sheepskin leather allows the foot to breathe and absorbs humidity so foot stays fresh and dry. Leather has especially effective active carbon layer that absorbs moisture and odor. This keeps shoes, socks, stockings and feet fresh. This item is double sized with guidelines for trimming. Flat and thin enough for even the dressiest shoes