Bioderma Atoderm Mains & Ongles 50ml. 8h hydration for dry to very dry handsNourishes the skin and strengthens the nailsLight, non-greasy texture leaving the skin soft and supple. This product has been formulated according to the ecobiological approach of the NAOS Laboratories to take care of you. At the heart of this product :. External stress can make the skin reactive and sensitive. This patented complex increases the skin’s tolerance threshold – regardless of the skin type – to strengthen its resistance.