In Merrell's Thermo collection of winter footwear, the Men's Thermo Cross 2 Mid WP Boot is a hybrid that balances weather protection with agile flexibility for easier hiking when it's still snowing. Its mesh upper is breathable as well as flexible, and M Select Dry laminates to it for rugged waterproofing. M Select Warm gives lightweight, low-bulk insulation for the warmth required while winter hiking. Merrell treated the upper's lining in M Select Fresh for anti-odor comfort. Underfoot, the Thermo Cross features a nylon shank under the contoured Kinetic Fit Base footbed for arch support and comfortable stability. Vibram's Arctic Grip is specialized for icy surfaces and frozen hiking trails.