Spira took the shoe industry by storm when they released their shoes with springs in them. The WaveSpring® Technology featured in Spira’s walking & running shoes for men & women returns energy with every step! The technology is in the heel and forefoot of the shoe. As such, it has the appearance of a normal shoe, and does need an elevated platform to provide full function. Additionally, the springs don’t break down like traditional materials used in shoe construction increasing durability.