Biotherm Biosource Toner Dry Skin Moisturizing tonic for dry Skin has a caring effect and gives pleasant sensations. Biosource Toner Dry Skin cosmetic penetrates deep into the pores, freeing them from dirt and making them less pronounced. The ability of tonic for dry skin to moisturize and nourish cells and tissues has a beneficial effect on the general condition of the face. Dull, lifeless skin becomes bright, smooth and looks very energetic. The effect of Biotherm tonic is also to enhance the effectiveness of your basic facial skin care products.