Helen Slipper, BlackA very chill, slip on slipper that might even be a shoe as well. Helen has a rubber sole with cork and a felted wool top. Inner Material: Wool Outer Material: Wool Outer Sole: Rubber Sole Made in Sweden. Care Sheepskin and wool require minimal care. Because of how breathable and permeable these natural materials are, cleaning them is a breeze (literally). Shepherd recommends hanging your slippers outside when its humid to let water vapor pass through