For Rigid Gas Permeable Contact Lenses. Sterile. Disinfects. Cushions. Wets. Boston Original Formula Conditioning Solution contains a patented wetting agent that coats the surface of your lenses to make them smooth, wet and comfortable. This unique ingredient actually helps reduce friction between your lens and your eye. Disinfection System Ingredients and What They Do: Chlorhexidine Gluconate (0.006%), Edetate Disodium (0.05%) - Kills micro-organisms (germs) on lenses. Wetting and Cushioning System Ingredients and What They Do: Patented Derivatized Polyethylene Glycol, Cellulosic Viscosifier, Cationic Cellulose Derivative Polymer, Polyvinyl Alcohol - Surrounds lenses with moisture to make them feel smooth and wet; Cushions lenses. Made in USA.