• Use


    Shoes with optimum cushioning, lateral support, and flexibility for daily workouts and studio sessions. See workout shoes


    Versatile, low-profile shoes for constantly varied exercises including plyometrics, sprinting, weightlifting, and rope climbing. See CrossFit shoes


    Heavy-duty shoes with a wedge and an elevated heel that create a sturdy platform and promote ankle mobility. See weightlifting shoes


    Shoes for daily wear that ensure a smooth walking gait cycle. Check out walking shoes

  • Arch support


    For people with normal pronation. Also provide support for high-arched feet with underpronation (excessive outward rolling of the foot). See neutral training shoes


    For people with low-arched or flat feet and moderate overpronation (excessive inward rolling of the foot). See stability training shoes

    Motion control

    Shoes feature stabilizing technologies for people with severe overpronation. See motion control training shoes

    Good to know

    Stability and motion control add-ons are uncommon for workout shoes and are never present in CrossFit or weightlifting footwear. They are mostly found in walking shoes where the gait is easier to correct.

  • Price
  • Weight
    Men: 12oz


    Training footwear typically weighs between 200g and 300g per shoe to accommodate agile workouts. Minimalist trainers go as low as 150g, while weightlifting shoes can go as high as 500g.

  • Width
    Men: Normal
  • Release date
Show more facts


We spent 8.8 hours reading reviews from experts and users. In summary, this is what training geeks think:

8 reasons to buy

  • A good number of reviewers were impressed by the comfort offered by the Nike Lunar Prime Iron II.
  • The merchandise was lauded for its overall style and design by plenty of owners.
  • Multiple testers claimed that the footgear was true to size and width.
  • A lot of gym goers were pleased that the upper provided adequate ankle support.
  • The product was regarded as a robust gym shoe by several fitness aficionados.
  • A few people approved of the upper’s breathability because it kept their feet cool during workouts.
  • The roomy toe box delighted a couple of individuals who liked that there was room for their toes to spread.
  • A commenter commended the traction of the outsole as it allowed for pivots and quick turns.

6 reasons not to buy

  • A minority of shoppers were dismayed that the Nike Lunar Prime Iron II did not follow the brand’s measurement scheme; it was short in length and narrow in width.
  • The lack of arch support irked a small number of buyers.
  • A handful of users disliked the glued-in insole as it did not allow them to use their custom orthotics.
  • This model is not as flexible as other Nike trainers and it needed breaking in, as relayed by some wearers.
  • A critic complained that the outsole has no traction on wet surfaces
  • A disgruntled person ranted that the color of the footwear was way off in person compared to the one shown on the product page.

Bottom line

The comfort and style of the Nike Lunar Prime Iron II exceeded the expectations of purchasers. Its breathability, ankle support, and traction resonated well with training enthusiasts. Though many were satisfied with the fit and the sizing, a few thought it was too short and narrow for the size it was labeled with. Other gripes about the product included the lack of arch support, the break-in period, and the glued insole which did not permit the use of custom orthotics. But in the end, consumers recommended it to their peers because it was a well-rounded trainer.


Expert Reviews

Experts are training geeks, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

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Updates to Nike Lunar Prime Iron II

  • Designed for men leading an active lifestyle, the Nike Lunar Prime Iron II is ready for action from the streets to the gym. This stylish cross-trainer is created with tough materials that could endure grueling workout sessions.
  • The upper is made of mesh to keep the foot chamber ventilated. The fabric is strengthened by synthetic overlays in the key areas.
  • The Flywire technology delivers lateral support by integrating with the lacing system. The cables become taut when the laces are tightened, delivering a snug fit.
  • To keep the foot moving, the footwear features the Lunarlon midsole. This technology is developed to be responsive to deliver a bouncy feel that keeps the foot comfortable and supported.
  • The underside of the Lunar Prime Iron II is lined with rubber. This compound is hard-wearing and provides traction on different surfaces.

Nike Lunar Prime Iron II size and fit

The Nike Lunar Prime Iron II caters to a man’s foot shape. It is available in US sizes 6 to 15. The width comes in a D - Medium profile. Nike offers the Size Guide tool which helps people correctly measure their feet and choose the right shoe size.


The outsole of the Nike Lunar Prime Iron II is made of rubber. This compound is designed to be durable in order to hold up during rigorous workout sessions. It extends to the front of the toes to protect the area during moves that require pushing off using the tip of the footgear.

Under the ball area of the trainer are the flex grooves. These furrows facilitate the natural flexion of the foot to impede plantar pains during a workout.

The tread pattern on this model is devised to provide multi-surface traction. The concentric markings allow the outsole to grip surfaces better and forestall slippage.


The Nike Lunar Prime Iron II employs the Lunarlon midsole. This foam technology has two parts: the core and the carrier. The soft and lightweight core is resilient. It spreads the shock from the impact to prevent injuries to the foot and the rest of the lower extremities. As for the carrier, this firm component serves as a shell that hampers the core from losing its shape, so that it could spring back up and be ready for the next hit. In this model, the carrier foam partially extends upwards at the lateral side of the midfoot to give support during side-to-side movements.


Containing the foot is the mesh textile. This fabric is meant to be breathable to keep the inside of the Nike Lunar Prime Iron II well-ventilated. No-sew synthetic overlays are used to reinforce high-abrasion areas such as the toe box and the side panels. They avert fraying of the underlying mesh.

The Flywire cables integrate with the lacing system. These thin but durable strings enhance the lateral support of the upper when the laces are cinched. They provide a snug yet non-restricting fit. 

The thin tongue evenly spreads the pressure created by the laces. This flap thwarts the laces from irritating the skin of the instep.

As for the lightly padded collar, it locks the foot down to avoid accidental shoe removal while the user is in motion. It also inhibits chafing in the ankle area.