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.