Information from their website:

These natural yarns are produced from sheep which are kept on organic land which is not treated with herbicides, pesticides or artificial fertilisers.

•Free from G.M.O’s and OP dips. •No harmful chemicals or inputs are used during processing. •No chemical moth proofing; Natural herbal insect deterrents are used. •No artificial flame retardents; Naturally flame resistant. •No conditioners. •No man-made fibres •Just pure certified organic wool spun to reflect the nature of the fleece.