Bladetech's patented Flex Force Advantage provides increased power in each kick and provides a documented effect of an average of 5.5% increased speed. 

The unique design works in such a way that the front part of the skate blade flexes up in the skate holder, collects the energy, and releases it when you complete a stride. The technology gives you an extra kick for every stride you take.

Independent tests show that it is particularly effective in the acceleration phase with increases in speeds of up to 20%.