With Nike's deep roots in running from its inception at the University of Oregon, it's only fitting for the brand to continue to innovate in that category. The 2014 Nike Free running collection was unveiled today and reinforces the footwear company's design philosophy when it comes to the relationship between an athlete's body and product design. Featuring the Nike Free 3.0 Flyknit, Nike Free 4.0 Flyknit, and Nike Free 5.0, the new running collection is driven by research that includes athlete insights and studying the foot in motion. Read more about each of the improvements below.

The outsole features a Nike first—a hexagonal flex-groove that promotes multi-directional flexibility and gives the runner's foot more freedom when it makes impact with the ground.

The updated design of the heel is inspired by mimicking the athlete's foot. The anatomical shape of the heel is designed to roll once the runner's foot makes direct contact with the ground, which allows for a more natural movement.

Nike's popular Flyknit technology is paired with the low profile of the Free outsole for more breathability and stretch. Not only does the knitted upper provide support, but it also allows the runner's foot to move in all directions.

These new running sneakers will be available on Nike.com and select Nike retailers on April 3. In the meantime, the Nike Free 4.0 Flyknit and Nike Free 5.0 are already available to customize on NIKEiD here.

RELATED: Sneaker Report - Nike Unveils the 2014 Free Running Collection

[Via Nike]