Just throw your Therm garment in the wash with your normal load - we recommend a warm wash with liquid detergent, not powder.
Plus all of our garments love the dryer! In fact the dryer is needed for the waterproof coating. If your Therm garment doesn't seem as waterproof as it was, just dampen it again and dry it fully in a medium to hot dryer.
IMPORTANT: Don't forget to zip up all zippers before washing and drying!