Moisturising & lubricating eye drops formulated with sodium hyaluronate 0.10%. The modern formulation of all Vizulize products means they don't use harsh preservatives & chemicals, such as Benzalkonium Chloride, used in some other branded products on the market today. The Vizulize eyecare range is a comprehensive range of contact lens friendly products suitable for use by vegetarians & vegans. None of the products are tested on animals & the sodium hyaluronate is a biotech developed molecule & NOT derived from animal products.