Biotrue Multi-Purpose Solution works like the eye to help make wearing contact lenses easier, no matter what lens you wear. No other solution includes these bio-inspired innovations. Biotrue Multi-Purpose Solution moistens by using a natural lubricant found in the eye and it is pH balanced to match healthy tears. To ensure optimal eye health, Biotrue Multi-Purpose Solution provides unsurpassed disinfection, while maintaining beneficial proteins and removing denatured proteins.