Conventional wool is far from being as eco-friendly as we would expect. However, there are some sustainable wool options on the market which make it possible for us to dress warmly and sustainably.
So far, we have found the Responsible Wool Standard (RWS), which ensures that farms use best practices to protect the land, and treat the animal decently.
Certified organic wool guarantees that pesticides and parasiticides are not used on the pastureland or on the sheep themselves, and that good cultural and management practices of livestock are used. Certified organic wool is still pretty rare on the market. GOTS seems to be the only organization certifying organic wool.