Spira is the latest and greatest in athletic footwear but you do not have to be an athlete to benefit from the new WaveSpring ™ technology many people are using Spira shoes as work shoes. Spira, also called spring step shoes, makes all activities from standing, walking, running and competition a more comfortable experience. The WaveSpring ™ technology consists on laterally stable, lightweight and compact springs found in both the heel and/or forefoot of the running and athletic walking shoes. Spira Athletic sneakers will literally put the spring back into your step.