Our verdict


Loved for its snug fit, spacious toe box, and comfortability, the Reebok CrossFit Nano 4.0 earned the appreciation of many wearers and reviewers. It has also over-delivered when it comes to high-intensity workouts that awed a significant number of enthusiasts. On the flip side, grievances about the rigidity of the upper that caused users blisters emerged. Despite that, the many positive traits the shoe has overturn the complaints.


  • Snug and secured heel
  • Roomy toe box
  • Impressive durability
  • Great quality-price ratio
  • Lightweight comfortable
  • Good flexibility
  • Breathable
  • Remarkable outsole grip
  • Comfortable out of the box


  • Rigid upper
  • Lacks arch support
  • Expensive

Who should buy the Reebok CrossFit Nano 4.0

Crafted specifically for CrossFit, this Reebok offering has innovations that provide support, steadiness, and agility. It is a solid option if:

  • You are into rope climbing and need a trainer that would help you improve your performance.
  • Your fitness regimen includes plyometrics, lifts, and squats, and you are looking for a shoe that is incredible for such activities.

Reebok CrossFit Nano 4.0 Logo2

Updates to the Reebok CrossFit Nano 4.0

  • The most obvious difference between the old model and this iteration is the absence of the Reebok Vector logo on the lateral side of the Duracage in this version. Instead, the Delta logo is more prominent, along with the CF74, a nod to the year 1974, the year CrossFit was born.

Reebok CrossFit Nano 4.0 Updates2

Multidirectional outsole grip

The underside of the Reebok CrossFit Nano 4.0 is protected by a rubber compound that works even when wearers use it to train on rough surfaces. It features a multi-directional tread pattern. It also rises up to cover portions of the medial and lateral sides of the midfoot. This forms the RopePro structure that bites the rope and assists wearers to ascend and descend safely.

Reebok CrossFit Nano 4.0 Outsole1

The bottom of the footwear has noticeable ridges called the Metasplit. They mimic the phalanges of the foot, and they bend with the natural movements of the wearer's foot.

Reebok CrossFit Nano 4.0 Outsole2

Shock-absorbent midsole

The midsole of this Reebok trainer is made up of two compounds. The forefoot uses the F48 cushioning unit that not only attenuates shock but is also quite flexible. The midfoot and the heel are lined with the S55 material that absorbs shock, has a high energy return, and is solid to keep the wearers steady during plyometrics, lifts, and squats.

Reebok CrossFit Nano 4.0 Midsole3

The low-profile cushioning platform also has a 4-mm heel-to-toe drop. This construction allows the gymgoer to feel planted to the ground and feel stable during dynamic movements.

Reebok CrossFit Nano 4.0 Midsole5

Breathable upper

The top of the foot is covered by an open weave mesh upper. This material is soft and pliable, and it reportedly allows the foot to move. It is also breathable and keeps the foot chamber well-ventilated.

Reebok CrossFit Nano 4.0 Upper1

Rope climb-optimized reinforcement

The upper is reinforced with Duracage which is made of polyurethane (PU), a type of plastic that is sturdy. According to reviewers, it protects the quarters during rope climbs. It also extends to the back of the shoe, creating a heel cup that keeps the rearfoot steady. 

Reebok CrossFit Nano 4.0 Duracage

Amplified lateral support

The lacing system at the midfoot integrates with the Duracage. When the laces are cinched, the lateral structures are drawn in, amplifying the support that the wearer feels.

Reebok CrossFit Nano 4.0 Lacing System1

The Reebok CrossFit Nano 4.0's rearfoot section

Wearers feel that the tongue evenly distributes the pressure created by the laces to keep the foot comfortable and secure inside the shoe. As for the collar, not only does it prevent chafing at the Achilles, but it also prevents the back of the foot from sliding out while training.

Reebok CrossFit Nano 4.0 Collar