Since the early 2000s the principle of natural motion has been an inspiration for Nike footwear designers across a variety of sports. In a pair of videos, Mark Miner – the designer of three Nike Free running shoes this season – explores the creative process behind his design.

The Nike Free collection debuts at retail April 5, featuring natural motion design with trans-tarsal cuts in the midsole arch for enhancing foot flexibility and strength. Three styles offer the Nike Free running experience for a variety of levels and preferences:

*Nike Free Run+3: Features the innovative Dynamic Fit construction, wrapping the arch and helping to eliminate the space between the foot and the shoe for a glove-like fit. A seamless upper provides lightweight support and ventilation where needed most.

*Nike Free 4.0: Modified siping helps inch this shoe closer to barefoot. A seamless upper and molded sock liner that follows the curvature of the foot provide a great fit and enhance comfort and support.

*Nike Free 3.0: Additional siping in the arch and a seamless lightweight upper help make this the closest Nike running shoe to barefoot for foot strengthening and flexibility. Pods of solid rubber in high wear areas enhance durability and traction.

Nike Free running shoes are part of a multi-sport Nike Free collection also featuring women’s training and men’s training footwear. Nike Free is also available for performance and design customization through NIKEiD.