The way back to school, the routine that resumes its course... Every year, the same refrain with the arrival of September. It is not always easy to get back to it after great breakaways and a total disconnection. In your suitcases, a few more grains of sand, and on your skin, a pretty tanned complexion that you want to make last, again and again, like a precious memory. Good news ! There are tricks to make it last a little longer.