You will enjoy sienna x tonight39s the night specially formulated to give a gorgeous tan that will develop quickly customers will be bronzed and ready to go after 2 hours infused with organic aloe vera and avocado extract tonights the night express spray tan has been specially formulated to give a gorgeous tan that will develop quickly the beauty of this spray tan is that it only need to be left on the skin for up to 4 hours and can then be washed off to reveal a perfect sunless ta