KEEN Revel IV Polar Waterproof Boot vs Merrell Coldpack 3 Thermo Mid Waterproof Boot

The KEEN Revel IV Polar is the warmer, roomier boot, rated to -40°F with 400g insulation and a wide Original Fit forefoot. The Merrell Coldpack 3 Thermo Mid is lighter at about 560g per half pair and uses Vibram Arctic Grip All Terrain, which is the more trusted sole on wet ice. Owners of both rate them well; the KEEN has the larger review base at 4.5 of 5. Pick the KEEN for deep cold and wide feet, the Merrell for mixed winter hiking where weight and ice grip matter more.

• Choose the KEEN Revel IV Polar if you face deep cold, want maximum warmth and toe room, and don't mind a heavier boot.
• Choose the Merrell Coldpack 3 Thermo Mid if you want a lighter winter hiker with Vibram Arctic Grip for slick pavement and trails.