Who should buy the Merrell Thermo Chill Mid Shell Waterproof

Thermo Chill Mid Shell Waterproof appears ready on cold, winter hikes; constantly exposing it on slushy grounds isn’t recommended though. It is a solid option if you:

  • Prefer a shoe that is intended for accompanying hikers on their winter adventures. 
  • Prefer a shoe that has a Kinetic Fit Base insole and takes care of cushioning and stability.
  • Prefer a shoe that renders surface traction.

Merrell Thermo Chill Mid Shell Waterproof logo

Excellent traction

With the M Select Grip outsole, this Merrell winter hiking boot gives traction on most types of terrain. Its lugs are 5 mm deep which bites into the ground. The chevron-like boots are adequately spaced to prevent muck from getting stuck, thus maintaining its grip. Its upright extension at the toe area yields extra protection.

Merrell Thermo Chill Mid Shell Waterproof outsole

Comfortable cushioning

Providing cushioning without the bulk is the boot’s EVA midsole. It is a rubber-like foam that grants comfort and absorbs shock from ground impacts. It houses a molded nylon shank which yields underfoot firmness. A trademarked Kinetic Fit Base insole cradles the foot and enhances support.

Merrell Thermo Chill Mid Shell Waterproof midsole


The Thermo Chill Mid Shell Waterproof is a mid-top winter hiking boot that employs a combination of PU-coated leather and mesh for its upper. Merrell’s M Select Dry protects the user against water penetration while allowing moisture to escape. 

Merrell Thermo Chill Mid Shell Waterproof upper

Maintains the freshness inside the boot

Another brand-owned feature, the lightweight M Select Warm, traps and reflects body heat for warmth. To maintain the freshness inside the boot, it employs the M Select Fresh. This probiotic technology prevents the development of odor.

Merrell Thermo Chill Mid Shell Waterproof insole 2.0

Durable toe and heel caps

A protective rubber shell wraps the base of the boot which boosts its sturdiness. Also, further reinforcement is granted by its durable toe and heel caps. Preventing intrusion of loose trail debris is the gear’s slightly padded, bellows tongue. Metal hooks, webbing eyelets, and around lace comprise its front closure.

Merrell Thermo Chill Mid Shell Waterproof toe box

Facts / Specs

Weight: Men 556g / Women 472g
Use: Snow, Day Hiking
Cut: Mid cut
Features: Lace-to-toe, Insulated / Orthotic friendly / Removable insole / Heel brake
Waterproofing: Waterproof
Width: Normal

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Paul Ronto
Paul Ronto

Over the past 20 years, Paul has climbed, hiked, and run 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 analyzes every detail of the shoes that you might buy.