Nikwax Footwear Cleaning Gel is a highly effective cleaner which has been specifically designed and optimized for breathable waterproof footwear. Ideal for footwear with breathable linings. e.g. GORE-TEX. Water based, biodegradable, non-flammable, and contains no PFCs, VOCs, optical brighteners, or added scent. Details: Prepares the footwear for proofing with an appropriate Nikwax footwear waterproofing product 125 ml/ 4.2 oz Scrub-brush head included Revitalizes water-repellency and maintains breathability Removes dirt and helps to release stains. Improves the appearance of dirty footwear