Nikwax BaseWash is a new product created specially for cleaning synthetic base-layers. It enhances the fabrics wicking properties, stopping them from stinking and helping them dry more quickly. Place Item(s) in washing machine * Apply Nikwax BaseWash in the machine"s dispenser * Select a normal wash cycle, start machine and complete cycle. Always refer to your garments care label * Alternatively, just apply Nikwax BaseWash in a simple hand wash * Drip-dry or tumble dry on a low setting if the care label allows Note: Do not use on waterproof clothing - Use Nikwax Tech Wash instead