When the feet can breathe the mind is relaxed. Haflinger Shirley slippers features a boiled wool upper and a soft sole. These slippers are built for comfort. Haflinger Splendor indoor slipper. This cozy women's slip-on clog has a breathable boiled wool upper, a contoured footbed and latex arch support for lasting comfort. The double-thick wool felt sole is dipped in polyurethane for durability. Decorated with bold polka dots,