This new model takes its cue from the Breitling Sprint, a 1970s watch with a pulsometer function. Impressively lightweight, it was made from resin for comfort on the wrist. The Endurance Pro swaps resin for Breitlight®. Non-magnetic, thermally stable and hypoallergenic, this exclusive to Breitling material is also highly resistant to scratches. 100% Swiss-made, it is 3.3 times lighter than titanium and 5.8 times lighter than steel. On this new model, the pulsometer scale is inscribed on the inner bezel. Power comes from the thermo-compensated SuperQuartz Calibre 82 movement which is ten times more accurate than conventional quartz. This COSC-certified Chronograph tracks seconds and 1/10th of a second. There is also a 30-minute counter. A colourful Outerknown ECONYL® NATO strap can be purchased separately. Water-resistant to 10 bar (100 metres/330 feet).