OPTI-FREE® Puremoist® Multi-Purpose Disinfecting Solution is a sterile, buered, aqueous solution containing sodium citrate, sodium chloride, boric acid, sorbitol, aminomethylpropanol, disodium EDTA, two wetting agents (TETRONIC® 1304† and HydraGlyde* Moisture Matrix [EOBO-41*- polyoxyethylene- polyoxybutylene]) with POLYQUAD* (polyquaternium-1) 0.001% and ALDOX* (myristamidopropyl dimethylamine) 0.0006% preservatives. HydraGlyde* Moisture Matrix is a proprietary multi-functional block copolymer that is primarily designed for wetting and lubricating silicone hydrogel lenses. Currently available in 300 ml.