Breathable, waterproof clothing sweats very quickly in damp and wet conditions and gets wet on the inside. If the outer fabric absorbs water, the clothing can lose up to 70% of its breathability. The durable water repellent (DWR) properties of the outer fabric of your jacket must be maintained to ensure comfort. With regular cleaning, you can clean your equipment 5-6 times with Nikwax Tech Wash before the waterproofing needs to be renewed. If Nikwax Tech Wash alone is not enough to refresh the durable water repellent (DWR) protection of your equipment (i.e. water does not bead off the fabric surface), it is time to refresh the waterproofing with the appropriate Nikwax waterproofing agent. 1x 1l tech Wash and 1x 1l TX Direct.