How to measure your foot length:
  • 1. Place a piece of paper against a wall.
  • 2. Stand on it with your heel against the wall.
  • 3. Mark where your longest toe ends (both feet).
  • 4. Measure from the edge of the paper to both marks in centimeters.
  • 5. Use the longest foot measurement and match it up to our size chart.
Size Chart
US UK EU cm (JP) HEEL-TO-TOE
in centimeters
5 2.5 35 22 21.6
5.5 3 35.5 22.5 22.2
6 3.5 36 23 22.5
6.5 4 37 23.5 23
7 4.5 37.5 24 23.5
7.5 5 38 24.5 23.8
8 5.5 38.5 25 24.1
8.5 6 39 25.5 24.6
9 6.5 39.5 26 25.1
9.5 7 40 26.5 25.4
10 7.5 40.5 27 25.9
10.5 8 41 27.5 26.2
11 8.5 42 28 26.7
12 9 43 29 27.6
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Women's Circadia Polar Boot

$155.00 $93.00

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Women's Circadia Polar Boot Women's Circadia Polar Boot
Women's Circadia Polar Boot Women's Circadia Polar Boot

Get-out-and-go warmth for winter hikes.

Women's Circadia Polar Boot Women's Circadia Polar Boot
Women's Circadia Polar Boot Women's Circadia Polar Boot
Women's Circadia Polar Boot Women's Circadia Polar Boot
Women's Circadia Polar Boot
Women's Circadia Polar Boot

Features

  • LuftCore technology embeds a lightweight, air-injected core into higher-density foam for enhanced midsole cushioning
  • 5mm multi-directional lugs for traction
  • 200g of KEEN.WARM insulation rated to -25°F/-32°C
  • Notch in back for Achilles comfort
  • Speed-lace webbing system with top collar hooks for comfortably snug fit
  • Heel-capture system for added stability
  • KEEN.DRY waterproof, breathable membrane
  • Eco Anti-Odor for natural odor control
  • Environmentally preferred premium leather from LWG-certified tannery
  • Infused with non-toxic vanilla fragrance during high-temp KEEN.FUSION bonding process

Material

  • Waterproof leather and performance mesh upper
  • Higher-traction KEEN.FUSION rubber outsole
  • Quick-dry lining for active use
  • Thermal Heat Shield insole captures warmth

Technologies

  • KEEN.DRY
    A proprietary waterproof, breathable membrane that lets vapor out without letting water in.
  • KEEN.WARM
    Our signature insulation is extremely compressible and light for the foot warmth it provides, and it retains its insulating ability, even when damp.

Care

Gently brush leather with a soft bristle brush or hand towel to remove loose dirt and debris. Tough stains may require a leather cleaner.

Whatever winter hiking looks like for you, warmth, comfort, protection, and traction are non-negotiable “must-haves.” So we built an insulated, waterproof, grippy hiker that checks all the boxes. All hike. No compromises.

• Warm and Dry:200g of KEEN.WARM insulation rated to -25°F and a KEEN.DRY waterproof, breathable membrane keep your feet toasty and dry.

• Better Leather: Environmentally preferred leather upper is lighter on the planet.

• Lightweight Cushioning: KEEN LuftCore technology embeds a lightweight foam core inside the midsole to absorb shock for comfort that lasts all day.

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Free shipping on orders over $100. Exclusions apply for Pro and ID.ME users

Free return shipping for all orders within the lower 48 states. You'll recieve a free return label that will be good for 30 days from your order date. Visit our Returns Portal

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Women's Circadia Polar Boot

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