On winter hikes, warmth, comfort and traction are non-negotiable. Luckily, the men’s KEEN Circadia Polar Mid hiking boots are the insulated, waterproof, grippy shoes that check all the boxes.
Features
- Waterproof leather and performance mesh uppers are made with premium leather from LWG-certified tannery
- PFC-free durable water repellent (DWR)
- Thermal Heat Shield insoles capture warmth
- Quick-drying linings
- 200 g KEEN.WARM insulation provides added warmth in cold temps
- LuftCore technology embeds a lightweight, air-injected core into higher-density foam for enhanced cushioning in the midsoles
- Notches at back of boots for achilles comfort
- Heel-capture system for added stability
- KEEN.FUSION rubber outsoles with 5 mm multidirectional lugs for traction
Imported.
Technical Specs
| Best Use |
Hiking |
|---|---|
| Footwear Height |
Over-the-ankle |
| Footwear Closure |
Lace-up |
| Waterproof |
Yes |
| Type of Waterproofing |
KEEN.DRY waterproof/breathable membrane |
| Comfort Range |
-25 degrees (F) |
| Upper |
Leather/performance mesh |
| Insulated |
Yes |
| Insulation |
KEEN.WARM |
| Midsole |
LuftCore air-injected foam |
| Outsole |
KEEN.FUSION rubber |
| Weight (Pair) |
Unavailable |
| Gender |
Men’s |
Size Chart
| 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 | 17 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| U.S. Men’s | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 | 17 |
| UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 | 13 | 14 | 15 | 16 |
| EU | 39.5 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 47 | 47.5 | 48 | 48.5 | 49 |
| Foot Length (in.) | 9.6 | 9.8 | 10 | 10.1 | 10.2 | 10.5 | 10.6 | 10.7 | 11 | 11.1 | 11.25 | 11.6 | 11.9 | 12.2 | 12.5 | 12.8 |
Sizing Notes
Measurements are stated in inches.























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