Specifically created for new breathable softshell designs Nikwax® SoftShell™ Proof restores and even increases the water-repellency of a wide range of softshell products that feature Windbloc® WINDSTOPPER® Schoeller® and Polartec® fabric technology. Nikwax recommends using Nikwax® Tech Wash prior to applying SoftShell™ Proof to remove dirt particles without compromising your softshell vapor transfer performance. This is superb treatment for enhancing the life of your favorite breathable garments.