The special feature of BI-RACE glasses is that they have a bifocal segment for fencing that allows you to see measurement and orientation devices at all times while practicing sports (chronometer, heart rate monitor, speedometer, GPS, etc.).
Now you can have a sports glasses for your sports outings and the peace of mind of controlling your watch or gps at all times with a perfect vision.
Bifocal segment graduated closely in powers from +1.00 to +3.00 Includes two pairs of graduated lenses: A gray pair Cat. 3 A yellow pair Cat. 1 Rods with anti-slip terminals Anti-slip boards