The name says it all EXPRESS RAPID results, with the premium offering of Aviva Labs... Aviva EXPRESS is not just a Rapid Tan, its a premium service you can offer your clients who know they deserve the best in the shortest time possible. Depending on skin tone, your clients can shower in as little as 1 hour and be confident that they will receive the same quality Aviva Labs results with their signature hypoallegenic ECOCERT DHA based ingredients. For LIGHT results, shower in just 1-2 hours, 3-4 hours for MEDIUM or 4-5 hours for the DARKEST of spray on tan results.