This is specifically designed to treat cotton and polycotton fabrics. It will leave a flexible water repellent treatment on the fabric fibers that allows air to pass through. So your clothes will remain fully breathable and water repellent. Capacity: 300ml Adds water repellency to cotton and polycotton and maintains breathability. Prolongs the life of gear and optimises performance in wet weather Easy to apply - can be used in a washing machine or by hand, no tumble drying required. Can be used on wet fabric inhibits rotting of canvas caused by dampness. Will not affect cosmetic appearance Water-Based - environmentally friendly, biodegradable, non flammable, non hazardous. Does not contain fluorocarbons.