The Redline Skate F2 & F3 are top-of-the-line skate skis that are built to win races. The F2 model is designed for faster, harder snow conditions. Both F2 and F3 models have Tuned Dynamic Response technology that ensures maximum energy return and optimal gliding surfaces throughout the entire ski push-off phase. This technology improves the feeling of skiing on snow and helps maintain speed. The F2 has longer pressure zones that increase top-end speed, and a longer groove to improve stability when skiing at high speeds and on harder snow.