Soles are covered with natural latex which makes them not slippery. Now slippers available with rubber soles. Follow here if you are interested https://www.etsy.com/listing/100254500/rubber-soles-for-felted-slippers
Wool is a perfect material for footwear. It is especially wear proof and warm. When you put it on, you won't want to take them off. They'll become as a part of your home outfit, as a part of your Home.
Try them! And all your family will envy you.
These are made to order but slippers can be made in any size. Please, ask if you have questions.
Usually it takes 5-7 workdays to make it and 1-3 weeks to ship.
Now express mail is available (2-5 business days).