The best way to wash merino is to use a phosphate/fragrance free product like Tide Free or a hunting specific detergent, wash on cool and hang to dry. You can put all of our stuff in the dryer, with the exception of the pants, but just like a pair of jeans it will last a lot longer if you keep it out of the dryer. Merino dries very quickly. thanks-Kenton... Hardstalk, cool avitar