The Bausch + Lomb Boston Advance Conditioning Solution is a rigid gas permeable (RGP) care system designed for contact lenses. This 3.5 fl oz solution is clear in color and features a disinfecting formula for maintaining optimal lens hygiene. With a period after opeing of 12 months and an expiration date of 01/01/2028, this full-size bottle provides essential care for your contact lenses to ensure clear vision and comfort throughout wear.