The Italian company Safilens has a patent for hyaluronic acid release in lenses, four years after it first presented its technology, which eases comfort for wearers of contact lenses. The patent is good in about 30 European countries, including Italy, France, the U.K., Spain, the Netherlands, Denmark and Germany. Safilens' Safe Gel 7 Days, Safe Gel 1 Day, and Safe Gel Toric 1 Day lenses are made with jaluronate gel, a natural biopolymer, to guarantee constant tear production and a balanced supply of oxygen.