Glerups - The Slip-On Honey Rubber Sole - CharcoalA house shoe you can wear outside to check the mail or empty the compost. 100% wool felt with a natural rubber sole. It is flexible, secure, and keeps feet warm and dry due to the natural characteristics of wool. Care: 1. Since wool has a natural ability to self clean, your glerups will stay fresh if you simply air them out and allow them to rest. 2. To remove stains we suggest that you gently clean on the stain with at light wet cloth and wool soap.