Optifree Pure moist multi purpose solution - Pack of 4 x 300 ml protein and lipid compounds from your tears can build up on your contact lenses, causing irritation and even affecting your vision. The solution binds to your lenses to prevent lipid build-up and remove protein deposits. Thanks to this advanced power against deposits, your lenses will stay clean and feel fresh. And besides offering up to 16 hours of moisture and removing deposits, it also contains an enhanced disinfection formula. The Polyquad and aldox dual disinfectants act against harmful microorganisms including bacteria, fungi and acanthamoeba. These proven ingredients disinfect all types of soft contact lenses. But this special formula is still gentle enough for sensitive eyes.