Traditional Mule SIlhouette Indoor/Outdoor Outsole Plush Feel Durable and Resilient Design Perfect to slip into the moment you wake up or walk in the door. We designed our Doggone Silly Plush Slippers to have a supportive and padded insole with a sturdy and flexible outsole. Their super soft fuzzy upper feels like a dream and the plush-lined footbed will have you ready to relax.