You may dry clean your product however, a gentle cold water, of not more than 30◦C, hand washed with a little gentle natural soap. Rinse in clean water and gently wring out excess water. Either lie flat to dry or hang in the shady breeze, as the harsh sunlight will fade the colour. A Front loading washing machine may be used with a little gentle liquid soap set on the Wool cycle. Do not tumble dry. Always keep wool items clean, aired and dust free when using or stored.
See more at: http://www.campaignforwool.org/about-wool/