Cressi F1 framelessF1 is the modern single crystal mask derived from PIUMA model with especially elegant, harmonious and Frameless technology. The very bright silicone finishes give it an attractive look enhanced by a wide range of colours. The silicone skirt is assembled directly over the glass without the need of assembly. This system guarantees a good visibility in all directions, especially to the sides because it allows a maximum approach eye glass without annoying