Verdict from 2 experts and 7 user reviews

7 reasons to buy

  • The MQM Rush Flex received high praises from many reviewers for being astoundingly light.
  • This Merrell footgear runs true to size, based on numerous reports.
  • Quite a number of users were impressed with the astonishing level of comfort offered by this shoe.
  • Its mightily supportive heel zone made several owners super happy.
  • Some consumers found the Merrell MQM Rush Flex’s surface traction nothing short of phenomenal.
  • The hiker’s fantastic breathability amazed one professional footwear blogger.
  • An expert was greatly smitten by the shoe’s superb stabilizing capability.

1 reason not to buy

  • This Merrell offering is slightly expensive.

Bottom line

Spectacularly comfortable and lightweight—this is likely what many would describe the Merrell MQM Rush Flex at the outset. Fortunately, the shoe is not just all about comfort and lightness, as it also offers excellent heel support and breathability in its true-to-size shell. It is just a bit of a letdown, however, that potential buyers must be willing to shell out extra bucks to obtain it. Overall, the MQM Rush Flex is a Merrell hiker built vastly capable of giving wearers the edge on the trail thanks to its set of synergistic qualities and features.

Tip: see the best hiking boots.

Good to know

  • Part of Merrell’s MQM (Moving Quickly in the Mountains) collection, the MQM Rush Flex wraps speed and performance in its protective shell. It is engineered with FLEXconnect—a company-owned technology that involves the boot’s Hyperlock heel counter, flex-groove midsole, and M-Select Grip+ outsole to grant hikers a combination of flexibility and control on the trail.
  • The boot’s lining and other key parts are imbued with M-Select Fresh. It is a Merrell-developed technology that deals with sweat and moisture to prevent odor buildup.

The MQM Rush Flex from Merrell is an adequately true-to-size, mid-cut day hiking gear for men and women. It is targeted primarily at hikers with regular-width feet. It is offered in full and half sizes. The footwear’s classic lacing system makes fit customization possible. Its heel pull loop and stretch collar, on the other hand, work together to expedite on and off.

This boot intends to secure the wearer’s footing over uneven terrain with the durable M-Select Grip+ outsole. Whether the surface is wet or dry, its multi-shaped, self-cleaning lugs (with a depth of 3 millimeters) get to produce traction in almost every direction. It is reinforced with TrailProtect pad which provides extra off-road support and protection.

For stability and underfoot cushioning on semi-rugged terrain, trail enthusiasts have the footwear’s dual-directional flex-groove EVA midsole to thank. As its name implies, this stabilizing layer is engineered with grooves which are found on the midsole’s forefoot for improved flexibility.

Working in conjunction with the boot’s midsole for underfoot comfort is the Kinetic Fit Base footbed. Besides cushioning, it also provides extra heel and arch support thanks to its bordered lower half.

The Merrell MQM Rush Flex’s abrasion-resistant upper is made of Cordura fabric. It is crafted with Hyperlock—the boot’s supportive heel counter made of molded thermoplastic polyurethane or TPU. The upper’s toe box also has a TPU covering for scuff and tear protection.

When it comes to lockdown security, the gear uses a fairly standard and rather minimalistic closure system. It is comprised of a handful of combination eyelets and regular, synthetic laces.


How Merrell MQM Rush Flex ranks compared to all other shoes
Bottom 33% hiking boots
All hiking boots
Bottom 45% Merrell hiking boots
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Bottom 33% day hiking hiking boots
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The current trend of Merrell MQM Rush Flex.
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Paul Ronto
Paul Ronto

Over the past 20 years, Paul has climbed, hiked, and ran all over the world. He has summited peaks throughout the Americas, trekked through Africa, and tested his endurance in 24-hour trail races as well as 6 marathons. On average, he runs 30-50 miles a week in the foothills of Northern Colorado. His research is regularly cited in The New York Times, Washington Post, National Geographic, etc. On top of this, Paul is leading the running shoe lab where he cuts shoes apart and analyses every detail of the shoes that you might buy.