The Nikwax Softshell Wash and Waterproofing DuoPack gives you two powerful options to clean and waterproof your softshell clothing that are easy and safe to use. Tech Wash is a soap based cleaner that you use in place of regular detergents or powders to clean clothing and equipment without damaging the DWR finish. Tech Wash works to revitalizes breathability and water repellent abilities. The other part of the DuoPack is Softshell Proof that adds water-repellent abilities and revives breathability in softshell garments.