Opti-Free Express Mpds solution keeps your lenses feeling comfortable all day by helping to retain moisture and prevent the build up of proteins. The powerful combination of Citrate, Tetronic 1304 and AMP-95 lets your lenses clean and condition themselves while in your lens case. Each key ingredient does its own special job. Citrate pulls protein away from your lenses. Tetronic 1304 removes dirt, lipids and debris. And AMP-95 repels proteins, shielding your lenses from buildup. The result? Lasting all-day comfort. Your eyes stay fresh and energized from morning to night.