SpringBoost shoes with DORSI Technology(TM) were developed in Switzerland and are backed by scientific research demonstrating their benefits. 

Step into your SpringBoost Spirit, Motion, or City shoes and immediately experience the effects of dorsiflexion.  Notice how the heel is positioned slightly lower than your forefoot. Do you feel you naturally stand straighter? Do you feel the gentle stretch in the back of your legs?  That's Dorsiflexion.  And that's going to help you get faster results.

SpringBoost shoes have a modular insole system with interchangeable insoles that enable you to adapt the degree of dorsiflexion to your physical condition and the training intensity you want.

DORSI Technology(TM) specifically recruits more muscle fibers in your legs, butt and lumbar region.  You will see and feel the results faster than you can imagine!