Hyabak 0.15% Eye Drops is a preservative free eye drops which is recommended for the treatment of dry eyes. It features 4-fold protection. It can be used with any sort of contact lenses. It is preservative free due to its unique ABAK container; a complex filtering system which ensures the sterility of the solution for 3 months from opening. ABAK container provides leakage-free and consistent dripping. Uniformly sized drops are dispensed by the container during every use.