Want an express self tanner that works harder ? NO SWEAT Our first gym proof express self-tanning mousse which prevents perspiration from ruining your tan. Moisture Mousse Express Active is time activated so it?s up to you Shower after 1 hour for a light natural tan. Leave on longer for a deeper darker skin finish. Simply rinse with warm water for just 40 seconds and hit the gym. Avoid soap or lotions after rinsing - your Skinny Tan will continue to develop over the next 8 hours. Showering with soap can take place 8-12 hours after first application.