Dryness is common, and BioNude is here for your moisturizing needs- made for the most sensitive skin types. BioNude closely mimics the body’s own natural lubrication- its formula is iso-osmotic and water-based, made with a base of hydroxyethylcellulose that won’t strip the body of its moisture so that you can say goodbye to down-there dryness. pH Rating: 3.9 – 4.3.