Rit's Back to Black Dye Kit can restore clothing back to a rich black in just a few easy steps. Perfect for many types of fabric, including cotton, linen, silk, wool, rayon, ramie or nylon. This kit can also be used to overdye clothing of any color to a vibrant black. Included is Jet Black All Purpose Dye, our darkest, richest black ever. Non-toxic and safe for sewer and septic systems. The kit also includes ColorStay Dye Fixative, our secret weapon to reduce bleeding and fading. Plus a pair of rubber gloves to protect your hands. Do your part to reduce your carbon footprint by dyeing clothing instead of buying new, which reduces CO2 emissions by 74%. All you need is a washing machine, plastic container or stainless steel sink to get started.