For best results we nikwax recommend cleaning the outside of your jacket using nikwax tech wash if care label allow with a damp cloth or rinse it under running water and sponge it down to move surface dirt follow care label instructions features simple and effective wax cotton proof from nikwax spray on application rejuvenates the water repellency of waxed cotton clothing overcomes the problems of gear wetting out prolongs the life of your wax cotton gear always read the care label and instr