About Express Clear Self-tanning mousse 6.76 fl OZ The St. Moriz Advanced Pro Formula Express Tanning Mousse offers shade control that begins to develop in just 1 hour, gradually building throughout the day to leave a rich natural tan. This advanced pro formula foaming water continues to build your tan for up to 48 hours before reaching maximum depth of color. With no mess and a streak-free finish, apply your tan with confidence and dress as usual without fear of transfer or patchiness, the product will continue to develop throughout the day, leaving behind a gorgeous, long-lasting glow.  With fragrance technology, this mood boosting water mousse will leave you feeling tan-tastic!