Verdict from 4 experts and 73 user reviews

6 reasons to buy

  • Thermal wonder: Droves of hikers, including experts, praise the excellent insulation of KEEN’s Revel IV High Polar. It lives up to its -40°F warming capability.
  • Day-one comfort: This winter hiker is comfortable straight from the box, numerous trail-goers say.
  • Supportive: Hiking enthusiasts love its reassuring ankle collar.
  • Waterproof: It keeps feet nice and dry, especially in and around melting snow.
  • Sticky: The Revel IV High Polar is part of our highly sought-after boots for being relentlessly grippy on icy surfaces.
  • Light: One of its many draws is its extraordinary lightness, despite its burly construction + 400 g of insulation.

2 reasons not to buy

  • Cramped: It could be roomier, according to a handful of adventurers. These folks miss the spaciousness of some of KEEN’s finest.
  • Lacing issue: The shoe not having KEEN's signature lace lock element is a disappointment. Testers said, “Its absence makes tightening the boot a challenge.”

Bottom line

Dubbed by KEEN as among their warmest boots, the Revel IV High Polar will keep frost bites several miles at bay as you mow down trails. Your feet will also thank you for gracing them with superb traction on ice in this comfy winter-specific pair. When it conforms to your foot, which happens almost instantly, leveled-up hikes in cold conditions are quite guaranteed!

Tip: see the best hiking boots.

Revel IV High Polar: A showcase of KEEN technologies

If there is ever a brand that takes homegrown tech seriously, it would have to be KEEN. The Revel IV High Polar is a testament to this with the following:

KEEN.WARM: At 400 g, this insulation will ensure sufficient warmth up to the lower calf in below-zero conditions. This tech coupled with the boot’s heat-trapping insole translates to cozy hikes for many hours!

KEEN.DRY: The Revel IV High Polar is fully waterproof because of this. Since the boot in question has a high clearance, a gaiter is not required to keep your tootsies dry in, say, 5 inches of snow.

KEEN.Polar Traction: This exclusive outsole provides high surface traction on icy surfaces. Engineered for frigid conditions, this rubber component does not freeze easily, keeping its effectiveness intact in extreme cold.


How KEEN Revel IV High Polar ranks compared to all other shoes
Top 10% hiking boots
All hiking boots
Top 11% KEEN hiking boots
All KEEN hiking boots
Top 7% day hiking hiking boots
All day hiking hiking boots


The current trend of KEEN Revel IV High Polar.
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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.