Nikwax TX.Direct Spray-On is a DWR replenisher for padded and lined garments. When your Windstopper jacket starts wetting out, even after its been washed with tech wash, its time to reproof. Spray on proofer is suitable for all waterproof and windstopper garments that have a DWR treatment.
It is essential to use a spray on DWR treatment for lined garments ( wash in treatments will make the lining waterproof which means it wont be able to breath)
Spray on also allows you to build up DWR on shoulders and seams.