Verdict from 1 expert and 17 user reviews

5 reasons to buy

  • A lot of the runners laud the grippy traction of the Newton BoCo AT 4. 
  • Many commend its versatility. 
  • A number of the athletes appreciate the water-resistant upper of the shoe. 
  • It is highly breathable, commented some. 
  • Several admire the shock absorption qualities of the shoe. 

2 reasons not to buy

  • Quite a few don’t like the discomfort it causes. 
  • According to some, it’s a little too stiff, especially on the underfoot. 

Bottom line

Built to withstand harsh conditions, the Newton BoCo AT 4 boasts durability and unrivaled traction. With this trail running shoe, expect an efficient and a high level of energy return with each stride. Grippy, comfortable, and secure- these are among the many features of the Newton BoCo At 4. 

Tip: see the best trail running shoes.

Good to know

  • The all-new and upgraded, water-resistant trail running shoe, Newton BoCo AT 4, promises to deliver a lightweight and grippy running experience.
  • Although there have been some components retained from the shoe’s predecessor, one of the notable updates made to the shoe is its knitted mesh upper. It has been designed to allow more air ventilation into the shoe to keep the foot fresh. 
  • The shoe has maintained the heat-welded overlays to keep an irritation-free running experience. 
  • To top it all off, the BoCo AT 4 has a removable insole that features anti-bacterial and irritation-free characteristics that aid most orthotics.

The knitted mesh upper of the Newton BoCo AT 4 hugs the foot for a sock-like fit. The padding on the tongue and collar of the shoe keeps a snugly fit, while the lace-up closure provides a customizable and lockdown fit. 

The shoe is designed using standard measurement and is available for both men and women who wish to enjoy the trails. 

The Newton BoCo AT 4 is powered by trail-specific outsole. This outsole has multi-directional lugs that enable maximum traction on rugged terrains. This outsole component also boasts its flexible qualities. 

Acting as a protective layer in the forefoot area of the shoe, high-density rubber adds to the overall durability of the shoe. 

Newton's proprietary Action/Reaction™ technology claims to power the speed delivered by the BoCo AT 4. It possesses trampoline-like cushioning that permits a more speedy bounce-back and loses less energy compared to other midsole foams. 

The interior construction of the BoCo AT 4 accommodates most orthotics. Supporting this, a removable, anti-friction, anti-bacterial ETC insole gives underfoot support and eliminates any odor-causing bacteria.

Found in the forefoot of the shoe is a biomechanical metatarsal sensor plate that allows more ground feel which boosts sensory feedback. 

Similar to the upper material of the Asics Gel Quantum 180 4, Newton BoCo AT 4 is coated with a knitted mesh that has water-resistant qualities and is known for being lightweight. It allows sufficient airflow into the shoe, increasing breathability. 

For an irritation-free and comfortable in-shoe experience, heat-welded overlays are furnished to the shoe. To keep out the debris and dirt from entering the shoe, a gusseted tongue is utilized. 

A toe bumper made out of rubber protects the shoe from trail hazards such as rocks and roots. To further increase the comfort and security of the shoe, its tongue and collar are lightly padded. A traditional lace-up closure keeps a lockdown fit of the shoe that keeps the foot from moving side to side. 


How Newton BoCo AT 4 ranks compared to all other shoes
Bottom 10% trail running shoes
All trail running shoes
Bottom 9% Newton running shoes
All Newton running shoes
Bottom 8% water repellent running shoes
All water repellent running shoes


The current trend of Newton BoCo AT 4.
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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.