I use both just incase i do a late appointment and they dont want to stop up to wash a fast tan off.And I have some clients that don't like to use a fast tan xxOk thanks for that. I tend to agree. Also the extreme can be washed off quicker can’t it. I recommend clients wash the fast off after 4 hours but I think I’d say 2 hours for the extreme. Can’t decide whether to swap the dark for the extreme or use both. What dya think? Xx