Nikwax is easy to use: It's simple to apply. For instance, for clothing just use in a washing machine on a normal wash cycle. Garments do not have to be tumble-dried to activate water repellency and there is no need to wait for a clean, wet garment to dry before waterproofing with Nikwax. Nikwax is safe to use: No propellant gases, non-persistant, environmentally safe. Not tested on animals. Contains no fluorocarbons. Nikwax keeps you dry: Our WaterBased products offer higher concentrations of waterproofing agents than aerosol products… up to 5 times more concentrated. Nikwax doesn't require heat to activate water-repellency, unlike fluorocarbon products, therefore works even on garments that can not be tumble-dried. Prolongs the use of gear and keeps you dry and comfortable in wet weather.