We spent 6.4 hours reading reviews from experts and users. In summary, this is what runners think:

5 reasons to buy

  • Several consumers welcomed the flexible configuration of the Nike Free RN 2018 Sun; they stated that it allowed the natural bending capacity of the foot.
  • The underfoot platform was deemed comfortable by most testers.
  • A few consumers noted that the reflective details on this running shoe were helpful in maintaining visibility at night.
  • A runner claimed that the upper fabrics were stretchy enough to accommodate a larger foot-shape.
  • The versatility of this product was lauded by those who have tried it; they stated that it worked well during short running sessions and gym exercises.

1 reasons not to buy

  • The interior of this running shoe felt a bit warm to the foot, according to some consumers.

Bottom line

The Nike Free RN 2018 Sun gained mostly positive reviews from those who have purchased it. They liked its flexible and comfortable underfoot platform, its reflective accents, and its versatile design. For them, it’s a reliable option for the roads. On the other hand, some people complained of a heat-retaining upper unit that hindered the quality of the in-shoe experience.



Among the better Road running shoes
A top rated Nike running shoe
It has never been more popular than this June

Expert Reviews

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  • The Nike Free RN 2018 Sun is a running shoe that’s designed for the neutral pronator. It has a lightweight and flexible build that’s meant to accommodate the natural movement capacity and bending prowess of the human foot. Even its name suggests freedom to move and have control over the pavement.
  • A knitted material serves as the fabric of the upper unit. Its purpose is to stretch and acclimate itself to the dimensions of the foot, thus giving a customized and agreeable wrap. Nike’s proprietary Flywire cables connect to flat laces, permitting the façade to hug the foot properly in tandem with the tightening or loosening of the lacing system.
  • Underfoot cushioning is given by the Phylon midsole foam. It is a full-length unit that is exposed to the ground. Textured sections on the external part of this ground-contact material are responsible for surface grip.

This special edition of the Free RN 2018  is true to size. It welcomes the usual expectations of consumers when it comes to length. The width profiles of this model are D – Medium for men and B – Medium for women. The semi-curved shape of this running shoe allows the natural curve of the human foot to acclimatize to the in-shoe experience.

The outsole unit of the Nike Free RN 2018 Sun makes use of a full-length foam that is wholly in contact with the ground. It has a textured surface to dole out traction over the asphalt.

The Tri-Star construction is a set of three-pointed holes that make the underfoot platform flexible. They also reduce the overall weight of the foam. Such a design permits the natural capability of the foot to bend as it goes through the gait cycle.

Sipes are patterned across the sections that are more inclined to flex. These tiny cuts are meant to heighten the sole unit’s ability to follow the motion of the foot.

Phylon is a proprietary compound that’s meant to provide responsive cushioning to the foot. It runs the entire length of the Nike Free RN 2018 Sun, ensuring full coverage. Its flexible design leads the runner towards a smooth heel-to-toe transition.

A foam insole is placed right above the primary cushioning platform. It adds a bit more support for the underfoot. It can be removed or replaced with a different insert.

A knitted fabric graces the upper unit of the Nike Free RN 2018 Sun. It is breathable and stretchy. It aims to provide a form-fitting coverage that’s also well-ventilated.

A soft fabric lining has the goal of hugging the foot and keeping it free of irritation. Its smooth nature also allows the runner to wear this shoe without putting on socks first.

A stretchy heel lock system is made up of a wraparound spandex cover on the heel collar. It’s designed to secure the back of the foot in place, preventing it from wobbling or exiting the foot-chamber unexpectedly.

Dynamic Flywire cables connect to the traditional lacing system via parallel eyelets. These wires jut out from between the exterior and interior layers of the upper unit, adjusting the fit in conjunction with the tightening or loosening of the shoelaces.

The padded collar and the stretchy tongue offer support to the instep and the heel, respectively. These parts of the shoe are also responsible for maintaining in-shoe steadiness.

Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.