Dylon Colour Catcher prevents colour runs whilst washing mixed coloured fabrics in your washing machine. Every time you wash bright or dark coloured clothes, traces of dye bleed into your laundry. These dyes build up leaving your colours with a dull, grubby appearance. Each Dylon colour catcher anti transfer sheet is treated with special ingredients which act like a magnet, removing loose dyes and dirt during the washing process. Now you can wash with confidence, prevent discolouration of your laundry and keep your colours bright by simply adding a Dylon colour catcher sheet to your wash as a part of your washing routine. 10 sheets per pack. Suitable for hand and machine washing. Suitable for use at all temperatures and on all fabrics. Safe for the dryer. Sheets are biodegradable and safe for the environment. Instructions for use are on the back of the packaging.