Rebook Nano X5

Celebrating the 15th anniversary of the iconic Nano line, the Reebok Nano X5 marks a turning point with significant improvements in comfort, stability, and all-around performance. Designed for the demands of CrossFit and functional training, this model promises top-tier durability and versatility.

Design and build

Right away, the Reebok Nano X5 stands out with a sleeker, less bulky design compared to its predecessors. The widened toe box allows for natural toe splay—crucial for lifts or long standing sessions. The Flexweave upper delivers impressive breathability and resilience, keeping your feet cool during even the toughest WODs.

The heel collar incorporates Performance Comfort technology, offering a secure and supportive fit during dynamic training. While some users with narrow heels may notice slight looseness in that area, the overall fit is solid and suitable for most foot types.

Stability and performance

Stability is one of the Nano X5’s strongest assets. The firm heel provides a solid foundation for strength work like squats and deadlifts. The dual-density midsole, branded as DUALRESPONSE, combines a firmer foam in the heel for added support with a softer foam in the forefoot for cushioning—ideal for sprints, box jumps, and burpees without compromising comfort.

The decoupled Metasplit outsole enhances flexibility and responsiveness for running and multidirectional movements. The grip is excellent, offering reliable traction during quick transitions and lateral moves.

Versatility

The Reebok Nano X5 excels across a wide range of activities—from weightlifting and HIIT to cardio workouts and long walks. Its 7mm heel-to-toe drop supports a natural movement flow between exercises, avoiding the imbalance that can come with more specialized shoes.

While not built for long-distance running, the X5 shines in gym sessions and functional training. Early impressions also suggest promising durability, though long-term wear still needs to be assessed.

Fit and sizing

The Nano X5 fits true to size and is designed to accommodate both narrow and wide feet. The spacious toe box and thoughtful overall structure offer a comfortable fit across foot shapes. The padded heel collar holds the foot securely, though—as mentioned—some with very narrow heels may feel a slight gap.

Comparison to previous models

Compared to the Nano X4, the X5 brings substantial improvements in comfort and versatility. The updated DUALRESPONSE midsole and Metasplit outsole provide a more balanced feel between stability and flexibility, making it better suited for varied workouts. The wider toe box also enhances comfort, appealing to a broader range of athletes.

Final thoughts

The Reebok Nano X5 represents a clear evolution in the Nano series—offering comfort, stability, and true versatility in a well-rounded training shoe. Built for functional fitness and high-intensity workouts, it’s a standout choice for athletes who demand performance and support across disciplines. While not designed for long-distance runs, its in-gym performance is hard to beat.