New Aqua-Gelée Autobronzante. Association of hydration expertise and self-tanning, Biotherm integrates the self-tan formula of Aqua-Gelée Autobronzante in a serum texture for a glide-on application and a natural result on the face. Biotherm brings its hydration expertise to selftanning: a self-tan formula in a light and fresh serum texture for a glide-on application and a natural result.