Acetate is a lightweight material and, consequently, very comfortable. That makes this material one of the best in terms of comfort. It comes mostly from cotton and has a very light weight, which allows to avoid weight on the nose. In addition, it is easily adaptable with heat and when it cools it acquires a hardly breakable stiffness. For these reasons, it is one of the materials used by Mook in the manufacture of several models.
And you can have always the guarantee of the polarization lenses.