It is made with Tea Tree Oil, which is a natural fungicide and bacteriostat, and is effective against dust mites. It has Lanolin which improves the luster and pliability of wool.
Put these two ingredients together and you have the best woolwash available for all your wool, down, and all the items you care about. This woolwash is water based and completely biodegradeable. It contains no enzymes, phosphates, peroxide or alkali.