For Soft Contact Lenses.Helps Prevent Protein Buildup*. Refreshes Lenses. For Use With All Soft Contact Lenses.Clerz® Plus Lens Drops is a sterile, buffered, isotonic, aqueous solution that contains a Citrate Buffer and Sodium Chloride, with Edetate Disodium 0.05% and Polyquad® (Polyquaternium-1) 0.001% as preservatives and Clens®-100 (PEG-11 Lauryl Ether Carboxylic Acid) and Tetronic 1304. Tetronic is a registered trademark of BASF Corporation.