Add waterproof performance to any softshell with the Nikwax SoftShell Proof Spray-On Waterproofing. Hassle-free spray-on application restores water-repellency of technical softshells without hindering breathability. Compatible with materials that have 4-way stretch, this spray-on waterproofing doesn't require any heat to activate. The water-based formula is biodegradable and free of optical brighteners, and added scent.Manufacturer model #: 441. Simple spray-on application Restores water-repellency to technical softshell fabrics Ideal for use on items with integrated 4-way stretch Won't compromise garment's breathability Doesn't require heat to activate Biodegradable water-based formula No optical brighteners or added scent