Our verdict


As Under Armour's first shot in creating a dedicated CrossFit trainer, the Tribase Reign succeeded in many different ways. Its support, stability, versatility, and overall design won the hearts of many fitness enthusiasts. However, its narrow fit failed to impress some wearers. On the contrary, those who managed to catch the right fit were delighted about the shoe. Its overall traits helped it become one of the top choices for cross-training.


  • Impressive CrossFit WODs performance
  • Great stability
  • True to size
  • Engaging aesthetic design
  • Excellent sole unit grip
  • Lightweight
  • Good forefoot flexibility


  • Narrow fit
  • Expensive

Who should buy the Under Armour TriBase Reign

Under Armour utilized various materials and merged them, producing a CrossFit trainer that offers supportive structure, responsiveness, and reliability during rigorous workouts. TriBase Reign is a solid prospect if:

  • You are looking for a shoe that provides not only outstanding functionalities and performance of a CrossFit WODs companion but has a truly appealing design. 
  • Your training routines involve gym activities and ropes and you are after a pair that provides sufficient grip to carry out those activities with less trouble. 

Under Armour TriBase Reign Logo1

The Under Armour TriBase Reign's outsole

The Under Armour TriBase Reign features a full-length rubber outsole. It is hardwearing, thereby preventing an early breakdown of the midsole. The TriBase technology refers to the three zones of the outsole. The forefoot features flex grooves that help with the upward and downward movements of the feet.

Under Armour TriBase Reign Outsole2

Anti-toe slippage

The construction of the rubber under the toes prevents slipping during push-ups and burpees. As for the sides of the TriBase, they are able to aid in torsional flexing that happens during quick lateral cuts.

Under Armour TriBase Reign Outsole3

Abrasion-resistant components

The rubber wraps the medial and lateral sides of the shoe at the midfoot. This element protects the midsole and a section of the upper from abrasion during rope climbs.

Under Armour TriBase Reign Outsole4

Enhanced platform stability

This pair of Under Armour training shoes is equipped with the Micro G midsole. This foam technology is 30% thinner than conventional foam, delivering a low-to-the-ground disposition which helps in keeping the foot stable.

Under Armour TriBase Reign Midsole1

Despite its thin appearance, its shock attenuation properties are similar to those of thicker platforms. It compresses but quickly bounces back to its original form for an explosive take-off. The 2-mm offset positions the heel only slightly higher than the ball of the foot. This low elevation is common for CrossFit shoes because it helps keep the rearfoot steady, especially during weight training.

Under Armour TriBase Reign Midsole3

Inside the trainer is a non-removable insole. It prevents slippage and enhances the shock absorption of the midsole.

Under Armour TriBase Reign Insole1

Ventilated upper

The Under Armour TriBase Reign employs the ripstop material for its upper. Ripstop is a type of fabric that has reinforcement threads interwoven into it at regular intervals making it both tear- and rip-resistant. The forefoot and the lateral quarter use a durable mesh with abundant perforations, keeping the interior ventilated.

Under Armour TriBase Reign Upper1

The Under Armour TriBase Reign's overlays

Synthetic overlays line the toe box, the eyestay, and part of the medial side of the midfoot. They amplify the durability of the underlying fabric, preventing it from disintegrating quickly.

Under Armour TriBase Reign Overlays1

Snug lacing system

A lace-up closure allows users to adjust the midfoot fit. It does not have a plush interior, but the upper molds onto feet for a secure foothold.

Under Armour TriBase Reign Lacing System

Stabilized rearfoot section

There’s a plastic component that is attached at the heel and rises to about a third of the rearfoot. It acts as an external heel cup that keeps the back of the foot steady during dynamic movements.

Under Armour TriBase Reign Heel