Nikwax Cotton Proof is a high-performance, wash-in waterproofing solution designed specifically for cotton, polycotton, and canvas fabrics. It adds Durable Water Repellency (DWR) to garments and equipment, reducing weight gain from moisture and maintaining breathability in wet conditions. Ideal for waterproofing clothing like trousers and jackets, as well as canvas packs, tents, and awnings, this environmentally friendly formula is easy to apply in a washing machine or by hand. Nikwax Cotton Proof prolongs the life of your gear and optimises its performance during wet weather adventures.