The unique and constant composition of Avène Thermal Spring Water gives its soothing and softening properties proven by numerous scientific studies. Tested by dermatologists, it provides soothing benefits for sensitive, hypersensitive and allergic skin. The unique and constant composition of Avène Thermal Spring Water gives it soothing and softening properties proven by numerous scientific studies. Tested by dermatologists, it provides soothing benefits for sensitive, hypersensitive and allergic skin. It works to comfort a range of everyday skin irritations including sunburn, razor burn, facial redness, itching, post-depilatory irritation, eczema and nappy rash.