Nikwax Nikwax Softshell Proof Wash-in (300ml) Nikwax Softshell Proof Wash-In The easy to use, safe, high performance wash in waterproofing for softshell clothing. Adds Durable Water Repellency and revives breathability - in a washing machine. How Nikwax SoftShell Proof™ Wash-In... Sale: $13.00 Add to Cart