Cotton Proof™ is the easy to use, safe, high performance, wash-in waterproofing for cotton, polycotton and canvas. It adds durable water repellency; reducing weight gain and maintaining the breathability of cotton, polycotton and canvas in wet weather. High performance waterproofer designed to enhance the performance of wet weather cotton and polycotton items. Easy to use wash-in waterproofing for all cotton, polycotton, canvas clothing and equipment. Adds water repellency, revives breathability and reduces water absorbency without tumble drying. Enhances the performance of your gear, keeping you warmer and drier. Water based, and contains no PFCs, VOCs, optical brighteners, or added scent. Recommended for all cotton and polycotton clothing and gear. Suitable for: jacket, trousers, Carhartt workwear, denim. Plus can be applied by hand to canvas covers, rucksacks, tents and awnings.