Dark Lotion by Xen -Tan is the most suitable self-tan lotion for a beautifully natural and a gorgeous shade of olive. It gives you realistic instant colour so that you see your tan as soon as you apply. For a dark tan, a thicker coat of Dark Solution is most suitable. The tan lasts for 7-10 days. This lotion is packed with rich moisturisers that leave your skin feeling evenly smooth and fresh.