Verdict from +100 user reviews

7 reasons to buy

  • The majority of customers praise the Merrell Thermo Glacier Mid Waterproof for being super comfortable.
  • Most of them agree that this boot feels supportive and cushioned.
  • Hikers who have worn the boots on icy trails admire its grip and traction.
  • One person who has Raynaud’s disease loves these boots for being warm. 
  • A few wearers have given it a “thumbs up” for being incredibly lightweight.
  • The Merrell Thermo Glacier Mid WP is sturdy enough for icy paths, write one avid hiker.
  • It’s a great footwear for snowshoeing, according to several reviewers.

2 reasons not to buy

  • Some verified buyers are disappointed with the plastic lace hooks.
  • One reviewer has mentioned that tightening the lace is frustratingly difficult.

Bottom line

Designed to keep you warm without slowing you down, the Thermo Glacier Mid Waterproof is another Merrell hiking boot that has fascinated outdoorsy folks for its performance on snowy and icy terrains. Admired for its grippy performance, insulation, and comfort, this boot makes a great choice for quick trips to the trail and even in casual activities around the town.

If not for its weak lacing system, the Thermo Glacier Mid WP would have captivated the hearts of a lot more hikers out there.

Tip: see the best hiking boots.

Good to know

-Featuring grippy Vibram outsoles, M Select DRY waterproof membrane, and Primaloft Aerogel insulation, these winter boots from Merrell are greatly suitable for snowy conditions and freezing temps.

-It comes with compression-molded EVA midsole for stability and comfort.

The Thermo Glacier Mid is a hiking boot designed for both men and women. It has a full-grain leather upper that conforms to the shape of the foot after some breaking in. The Kinetic Fit BASE insole and the traditional lace-up closure also helps the wearer achieve a snug and custom fit.

The shoe outsole features the Arctic Grip by Vibram, which is the latest sole technology yet for winter hiking boots. It utilizes an advanced cold-weather gripping system specifically engineered and designed for wet ice. 

Wet ice is the biggest challenge that winter hikers encounter because it’s very slick. Without enough foot traction, you can slip, fall, and suffer from a serious injury. The Thermo Glacier Mid WP outsole is equipped with 5mm lugs for maximum traction. This makes the boot suitable not just on wet ice but also on dry ice.

According to Vibram, the Arctic Grip has “up to three times better grip” on snowy surfaces than other Vibram soles.

This winter hiker from Merrel features a compression-molded EVA midsole (CMEVA). In this method, a block of EVA is inserted into a mold. As heat and pressure are applied, the material expands and fills in the shape of the mold.

While there is a newer approach to producing midsoles called “EVA injection”, compression remains popular because it creates a better design detail. The traditional process also results in firmer midsoles, which are more preferred in hiking shoes.

Additionally, the Thermo Glacier Mid WP features a heat-reflective midsole that works by radiating body heat toward the foot.

For the upper, this boot makes use of full-grain leather. This specific type of leather is also used in other premium boots and hiking footwear because it’s naturally durable, water-resistant, and has the ability to conform to the shape of the foot.

The Thermo Glacier Mid WP is lined with M Select DRY impermeable membrane to keep water and moisture from entering the boot. Plus, it is equipped with 1.5mm Primaloft Aerogel over-the-toe insulation, along with Conductor fleece lining for warmth.

Completing the upper are the molded nylon arch shank, protective rubber toe cap, red laces, and bellows tongue.


How Merrell Thermo Glacier Mid Waterproof ranks compared to all other shoes
Bottom 34% hiking boots
All hiking boots
Bottom 42% Merrell hiking boots
All Merrell hiking boots
Bottom 25% snow hiking boots
All snow hiking boots


The current trend of Merrell Thermo Glacier Mid Waterproof.
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Paul Ronto
Paul Ronto

Paul loves adventure. Over the past 20 years, he has climbed, hiked, and ran all over the world. He’s summited peaks throughout the Americas, trekked through Africa, and tested his endurance in 24-hour trail races. He has worked in the outdoor industry as a whitewater and hunting guide, gear tester, copywriter, and outfitting specialist at places like The National Outdoor Leadership School, No Barriers USA, and Sierra Trading Post. He has been quoted in NYMag, NBCNews, and Business Insider to name a few.