I have used Dylon Dyes over the past few months on jeans and cotton trousers They are very easy just put it in the washing machine. The only thing you have to watch is if there is anything nylon on the clothes i.e. stitching coz it wont cover that! I was very impressed with the jeans they look like new! Have a look on their website http://www.dylon.co.uk/colours.html