This is an entirely customisable self tan. Let it develop for 1 hour before rinsing off for a natural looking bronzed glow, 2 hours for a deep tan & 3+ hours for the darkest result possible. This green based formula is most suited to individuals with a medium skin tone, giving a rich, chocolatey finish. This 1 Hour Express Ultra Dark continues to develop once you have rinsed off the initial colour guide. Refrain from using soap for the first 8 hours after applying to ensure an ultra dark finish.