Verdict from 1 expert and 100+ user reviews

6 reasons to buy

  • Insulation: Droves of users find the Merrell Thermo Chill Mid Waterproof incredibly warm.
  • Weight: This winter boot is surprisingly light, according to many hikers.
  • Comfort: Based on several reviews, the Thermo Chill Mid Waterproof is plush through and through.
  • Waterproofing: To a few trail busters, its ability to repel wetness is truly remarkable.
  • Grip: The boot has A-grade surface traction, less than a handful of hikers claim.
  • Support: A reviewer is impressed with its highly supportive arch zone.

2 reasons not to buy

  • Lockdown: The laces of this winter-season gear come undone easily, say a couple of testers.
  • Fit: According to a very small number of patrons, the Thermo Chill Mid Waterproof could be more spacious around the forefoot.

Bottom line

Switch from your regular hiking boots to a pair of these bad boys and triumph over icy trails like a boss. Yes, this tough-yet-comfy footgear has all the insulation you need on frigid terrain, all while keeping things at a minimum weight-wise. And while it favors regular-to-narrow-footed folks, it gets the job done when it comes to keeping moisture at bay.

Tip: see the best hiking boots.

Merrell Thermo Chill Mid Waterproof: What you need to know

Interesting takeaways:

  • It uses 200 g of M Select Warm, which provides enough insulation up to the rim of the ankle cuff.
  • Its partly mesh, partly leather upper is coated with polyurethane, giving the hiker even more protection against jagged rocks.
  • The Thermo Chill Mid Waterproof’s rubber panels provide additional side-to-side support, while its arch shank delivers increased midfoot stability.
  • Debris and the like are kept fenced out thanks to its bellows tongue.

A few considerations:

  • On its stout midsole and extra chunky sole (rear part), you might feel a bit too far away from the ground.
  • It does not come with a rockered heel, which could make walking on flat and hard surfaces a challenge to heel strikers.

Merrell Thermo Chill Mid Waterproof vs. Thermo Chill Mid Shell Waterproof

Comparisons within Merrell’s selection of high-quality hiking boots are nothing new, and this head-to-head only solidifies that fact. In the points that follow, you will discover what sets the featured boot apart from the Thermo Chill Mid Shell Waterproof.

Weight. The Thermo Chill Mid Waterproof is lighter than its rival by about 50 g.

Rand. Both kicks have protective randing. That said, the one in the Thermo Chill Mid Shell Waterproof is seamless, hence the ‘Shell’ in its name.

Collar. The ankle cuff of the Thermo Chill Mid Waterproof is contoured, allowing for some lower leg mobility. The competition’s collar, on the other hand, has none, which maximizes support.

Final word: Both hikers in this comparison are fantastic options for winter. That being said, if you value movement more, opt for the featured boot. If you prefer better protection overall, choose the Thermo Chill Mid Shell Waterproof instead.


How Merrell Thermo Chill Mid Waterproof ranks compared to all other shoes
Bottom 44% hiking boots
All hiking boots
Top 37% Merrell hiking boots
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Bottom 32% snow hiking boots
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The current trend of Merrell Thermo Chill Mid Waterproof.
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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.