Wool is a very sensitive material and if not washed correctly, can make your clothes look like they should fit on a doll. NIKWAX has gone ahead and produced a great product called Wool Wash that eliminates that error and allows you to wash your wool clothing effectively. Simple just use it instead of soap in your washing machine, throw it on delicate/cold water and let it do it's job.
We recommend to always allow wool clothing to air dry instead of heat dry. That way you are taking less chances that your gear could shrink. If anything throw your gear in the dryer for about 3-5 minutes depending on the load and then pull them out to help jump-start the drying process.
Safe on Merino Wool!