Thealoz Duo Gel 30 single unit doses:Contains Trehalose, Hyaluronic Acid and CarbomerPreservative FreeHypotonic gelCan be used alone or as an addition to Thealoz Duo dropsSuitable for night time useProvides long lasting relief of Dry Eye symptoms as an alternative to more frequent use of dropsEasy to apply, without stickiness Thealoz Duo, the latest innovation in the Spectrum Thea preservative-free Dry Eye range. Providing the best of both worlds... Hyabak to hydrate and lubricate and Thealoz to hydrate and protect all in the easy to use ABAK bottle.