• Discontinued
  • 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
  • Heel to toe drop
    Men: 5mm
    Women: 5mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
Show more facts


We spent 10.1 hours reading reviews from experts and users. In summary, this is what training geeks think:

6 reasons to buy

  • The Reebok CrossFit Nano Pump Fusion held up well for various CrossFit WODs, cardio training, short runs, and gym sessions, as stated by most testers.
  • A lot of wearers lauded the comfortable fit of the trainer.
  • A light, yet sturdy material of the upper unit gained the favor of many users.
  • The Pump technology was welcomed by some athletes; apparently, it allowed them to customize the fit precisely to their preference.
  • A handful of reviewers took note of the excellent grip of the outsole.
  • Some buyers found the style of the shoe to be clean and modern.

6 reasons not to buy

  • A considerable number of wearers complained that the tight bootie construction of the upper required a lot of effort to put on the shoe.
  • Many purchasers experienced inconsistencies in the sizing scheme; the shoe ran either longer or shorter than they expected.  
  • Some users found the Pump technology to be a gimmick; apparently, they didn’t even need to use it to get the right fit.
  • A few athletes reported that the Pump deflated during the workout; moreover, it flattened to a different extent in each shoe, making the fit uncomfortably uneven.
  • A customer wrote that the trainer slipped off during a sled push exercise.
  • Several buyers thought that the product was overpriced.

Bottom line

The Reebok CrossFit Nano Pump Fusion was welcomed by a large number of cross-training aficionados. The style, the traction, the fit, and the materials were among the touted agreeable assets of the trainer. The hallmark Pump technology didn’t seem to earn many fans as not all users found it helpful in achieving the right fit. Some of the other gripes included the tight opening, which made it difficult to put on the shoe, as well as the lack of consistency in the sizing scheme. Overall, the construction CrossFit Nano Pump Fusion was found to be very similar to the Reebok Nano models. But the use of the Pump technology resulted in a more expensive price tag, which wasn’t well-taken by some purchasers.


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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89 / 100 based on 7 expert reviews

  • 90 / 100 | RIZKNOWS

    Don't get me wrong, I really like these shows, but they're more of a second pair of CrossFit shoes.

  • 90 / 100 | The Morning Drive With DamianJay

    I would say that they're a lot more comfortable than the regular Nanos and i think, llike I sad, it's because of that bladder for you to pump it, so you have a lot more room in there.

  • 95 / 100 | Football Fashion

    Visually stunning, customizable, sturdy and extremely functional, the Reebok Pump ZPump Fusion is one of the standout training shoes of 2015.

  • 92 / 100 | All the Gear No Idea

    I quite liked putting a few extra pumps into the shoe when I was doing some heavy Oly lifting, this gave me a really sturdy base and snug fit that gave me great confidence when hitting 1 rep max lifts.

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Updates to Reebok CrossFit Nano Pump Fusion

  • The Reebok CrossFit Nano Pump Fusion was created with rigorous CrossFit WODs in mind. Its design pulls cues from the Reebok Nano series, blending it with the brand’s proprietary Pump technology. The Pump features a small inflation device that pumps air into a distinct bladder in the ankle area for a customized fit.
  • The foot is wrapped in the Kevlar®-infused fusion fit sleeve, which prevents chafing inside the shoe and provides abrasion-resistant coverage on the outside. A synthetic mesh shell is added around the forefoot and midfoot sections for a breathable structure. It is also made of the durable Kevlar® material for durability. The shoe has a bootie construction without a separate tongue, which is meant to offer a sock-like fit.  
  • In the midsole, the CMEVA rebound foam ensures cushioning and shock absorption. A low-profile platform with a 5 mm drop provides a more grounded and stable foot disposition during lateral moves and weightlifting.
  • A rubber outsole features raised lugs for enhanced traction. The carbon rubber RopePro compound in the midsection delivers grip and protection during rope climbing. The MetaSplit grooves in the forefoot allow multidirectional flexibility.

Reebok CrossFit Nano Pump Fusion size and fit

The Reebok CrossFit Nano Pump Fusion can be found in both men’s and women’s versions. Both are offered in full and half sizes. The product follows standard training shoe measurements regarding length. The widths are D – Medium for men and in B – Medium for women.

The use of the Pump Air Cage in the helps athletes in achieving the optimum fit. By pressing the “pump” button, a wearer can regulate the amount of air in an inflatable chamber inside the shoe. It inflates to provide a lockdown fit in the ankle area. The toe box was designed to be flexible and spacious, allowing natural toe-splay during weightlifting and jumping. Because of the shoe’s unique construction, it is advisable to try it at a local store before purchasing.


The CrossFit Nano Pump Fusion features a rubber outsole with raised lugs to offer traction on a variety of surfaces.

The abrasion-resistant RopePro compound wraps the medial side of the sole for additional protection during rope climbing. It is made of the durable carbon rubber which “bites” the rope on the ascent and guards the platform against friction on the descent.

The MetaSplit expansion grooves in the forefoot section allow the sole to bend in multiple directions. It accommodates natural toe-splay, which is essential in maintaining stability during weightlifting.


The Reebok CrossFit Nano Pump Fusion employs the CMEVA (Compression-molded EVA) foam midsole. Its rebound property serves to deliver responsive cushioning and impact attenuation.


A one-piece bootie construction of the CrossFit Nano Pump Fusion aims to offer a snug, sock-like fit.

A Kevlar®-infused fusion fit sleeve wraps the foot, providing irritation-free coverage and protection against abrasion.

The upper also receives its structure from a synthetic, Kevlar®-infused shell. It is placed around the toe box and on the midfoot for 360-degree durability. It features open mesh to retain breathability.

The trainer makes use of the proprietary Pump technology. It features an inflation device near the heel that pumps air into an inflatable unit inside the shoe. The volume of the bladder is regulated to provide a comfortable, lockdown fit in the ankle area.