Spira hiking shoes, trail shoes and trail running shoes incorporate revolutionary WaveSpring technology. This unique technology, exclusive to Spira footwear, is unlike traditional coil and conical springs in that it helps make Spira hiking shoes, trail shoes and trail running shoes more laterally stable, compact and lightweight. This combination allows remarkable energy return and performance; in fact, Spira shoes recorded the highest energy return ever. Spira hiking shoes, trail shoes and trail running shoes allow people to participate in physical activity for longer with far less stress on the body. Recovery time is also greatly reduced when wearing Spria footwear. Spira WaveSpring shoes stand alone at the forefront of footwear technology; trust Spira hiking shoes and other Spira WaveSpring boots and shoes to provide you with the comfort and performance you need during high-impact activity.