SF2573 Glasses by Sferoflex. The square shape design features a full rim metal frame. This model is available in eight different color combinations and sizes. The skillful use of the latest technology and traditions of Italian optical production ensures the high quality standard that the owners of Sferoflex eyeglasses value year after year. The company’s many years of experience has been embodied in the eyeglasses collections of different styles and shapes, which as a result give the image an amazing and unsurpassed elegance and style. Sferoflex is known for using innovations including the patented flexible hinge which makes temples perfectly fit the size and the shape of any face. This detail makes wearing glasses more comfortable and enjoyable.