To mark the launch of three new styles to the Nike Free running collection (5.0, 4.0 & 3.0) Nike have compiled an A-Z of Nike Free which highlights the new footwear and shares the inside story of Natural Motion.

And as always, Sport-locker.net have all the details…

Feet are the foundation of movement. When they’re able to flex, stretch and be themselves, the natural technology we were all born with does what it was meant to do.

This is the insight that led to the creation of Nike Free shoes almost ten years ago and it continues to drive design enhancements today.

This season Nike Free presents five new styles across running and training – the Nike Free 5.0+, 4.0 and 3.0 in running; the Nike Free TR Breathe for women’s training; and the Nike Free Trainer 5.0 for men’s training.

The idea for Nike Free emerged in 2001, launching years of study, testing and design to make a shoe that delivered the benefits of natural motion while protecting the foot.

More than a decade later, the 2013 running shoes retain the well-known flexibility of Nike Free’s articulated outsole, and introduce three new upper designs for enhanced natural motion:

•Nike Free 5.0+: Dynamic Nike Flywire technology provides secure support without added weight.

•Nike Free 4.0: Utilizes no-sew overlays and a tongue-wrap fit for stitch-free comfort.

•Nike Free 3.0: Nike engineered mesh improves fit and breathability with looser patterns where ventilation and stretch are needed and tighter patterns in areas where support is key.

This is just the start of the story. To learn the past and glean the future of one of Nike’s key running franchises, explore Nike Free A-Z, an interactive experience that examines key moments behind this technology’s genesis, evolution and vast influence.

Through imagery, video, and interviews with innovators and athletes, Nike Free A-Z sheds light on the design process and illustrates Nike’s constant commitment to serving the athlete.

The A-Z includes insights from athletes Allyson Felix and Dathan Ritzenhein, the innovation and design team, and outlines the franchises’ history.

From hot knifing to dynamic Nike Flywire technology, Nike Free A-Z takes you on the journey of how a coach’s insight about natural motion led to a new performance language.

So what do you think of Nike Free collection? What’s your favourite part of the A-Z? Let us know in the comments section below or on our Twitter and Facebook pages.