Summary

We spent 9.2 hours reading reviews from experts and users. In summary, this is what runners think:

5 reasons to buy

  • The Merrell MTL Astrum has an outsole unit that is able to grip the ground well, based on most reviews.
  • Those who appreciate running in the winter season are happy with the warmth given by the upper unit.
  • Some consumers believe that this beast of a trail running shoe does not reflect a heavy form.
  • The upper unit is said to be supportive and protective, particularly when it comes to debris on the trails.
  • According to some wearers, the midsole and facade are helpful enough to maintain a steady in-shoe experience throughout the run.

2 reasons not to buy

  • A few consumers have reported that the in-shoe experience is a bit wobbly.
  • Some testers believe that the upper unit of the MTL Astrum is not as ventilated as expected.

Bottom line

The reaction towards the MTL Astrum has been positive. People appreciate this winter-optimized Merrell trail running shoe because its elements are designed to fully support the runner throughout those trudges through the snowy landscapes. The traction-ready outsole and the secure in-shoe experience are highlighted. Additionally, the MTL Astrum also possesses attributes of no-bulk warmth and industrial-strength traction.

Fans of black running shoes that are for the off-road paths can enjoy the MTL Astrum.

Facts

Terrain: Mud, Snow, Trail
Arch support: Neutral
Weight: Men: 11.6oz | Women: 9.7oz
Heel to toe drop: Men: 6mm | Women: 6mm
Fit: Medium forefoot, Medium toe box, Wide heel
Pronation: Neutral Pronation
Arch type: High arch
Use: All-day wear | Jogging
Waterproofing: Water repellent
Material: Mesh upper, Rubber sole, Vibram sole
Features: Sockless wear | Cushioned | Comfortable
Strike Pattern: Midfoot strike
Distance: Daily running | Long distance | Marathon
Technology: Vibram
Season: Winter
Heel height: Men: 30mm | Women: 30mm
Forefoot height: Men: 24mm | Women: 24mm
Brand: Merrell
Type: Heavy | Big guy | Low drop
Width: Men: Normal | Women: Normal
Price: $170
Colorways: Black
Size
Small True to size Large
Forefoot fit
Narrow Wide
Heel fit
Narrow Wide
Toebox
Tight Roomy
Flexibility
Stiff Flexible
Breathability
Warm Breathable
Cushioning
Firm Plush
Stability 5/10
Durability 10/10
Comfort 6/10
Traction 10/10
See more facts

- Winter-Optimized running experience is what the Merrell MTL Astrum is aiming to provide. This running gear boasts a bevy of technologies that are meant to better the performance of the runner on soft and wet ground. The outsole unit has been configured to handle slushy topography. In contrast, the upper has been specifically designed to stave off the cold and wetness associated with snow and mud.

The Merrell MTL Astrum is designed to be true to size. Runners are meant to use their usual sizing choices when vying for a pair. However, there have been reports that the fit is a bit loose or inconsistent, so being able to adjust expectations can be influenced by the personal testing of this shoe.

This shoe doesn’t have a bulky construction, yet it features a high-top collar and a seamless build that averts chafing. The natural curve of the foot is accommodated by the curved platform and the foot-shaped upper unit.

The outsole unit of the Merrell MTL Astrum uses a triple-density Vibram® compound. The grippy nature of this material is for the provision of traction across a variety of surfaces. It is also meant to be durable enough to withstand abrasion general wear.

Clawlike traction lugs are fashioned all over the external pad. These individual protrusions are tasked with clamping onto the ground, delivering surface steadiness that can improve the overall performance of the runner. The even spacing of the lugs prevents snow or mud from caking the outsole and causing discomfort or adding unnecessary weight.

The midsole unit of the Merrell MTL Astrum is made of compression-molded ethylene vinyl acetate (CMEVA). This technology is an industry-standard one. It offers reactive cushioning in a lightweight package. It can even encourage energized steps because of its slightly spongy nature.

TrailProtect™ is the name of a rock plate that is placed between the outsole and the midsole. This add-on is tasked with shielding the foot from debris and sharp surface on the trails.

An insole is placed above the primary cushioning unit. This accouterment offers an extra layer of softness for the underfoot to enjoy. It has a heat-reflecting capacity that maintains a warm in-shoe feel, especially when tackling cold conditions.

The upper unit of the Merrell MTL Astrum is made of a synthetic mesh, the job of which is to cover the foot and keep it secure at all times. Despite the net-like structure, the vents deliver on the promise of a warm sensation when exposed to the cold of winter. Water is also repelled by this material.

A Lycra® high-top collar graces the foot with an internal wrap that is stretchy and seamless. The slip-on nature of this shoe-part is for a quick and effortless on-and-off experience. Anatomical positioning and movement are also encouraged by this technology.

A speed lacing system is used for this running shoe. The one-pull technique that is involved with this feature prevents runners from taking too much time adjusting the fit. Many running shoe series feature quick-lace in some form, including the revered Salomon Speedcross line.

Comparison

Author
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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.

jens@runrepeat.com