Nikwax Tent & Gear Solar Wash adds DWR, increases fabric strength & protects against UV deterioration. One application can double the effective life of fabrics, by protecting against UV damage, while also providing Durable Water Repellency (DWR) to keep the rain out. Spray On 500ml Cleans Effectively Increases Fabric Strength Protects Against UV Deterioration Environmentally Safe Not Tested on Animals