The nikwax tech wash 300ml a non detergent biodegradable liquid soap which removes dirt and detergent residues while leaving water repellency and breathability intact use to clean all clothing before re proofing nikwax tech wash 300ml features will not damage waterproof layers apply undiluted for stubborn stains easy to apply can be used in a washing machine suitable for use on all fabrics including technical textiles unlike detergents