The Falcon Evo NBK Boot uses a 3D thermo-shaped collar and a leather collar to lock in a precise, secure fit around the ankle. A water-resistant Nubuck upper pairs with Gore-Tex Extended Comfort Footwear for durable protection that still breathes on the trail. The leather comes from a tannery rated by the Leather Working Group, adding a sourcing standard behind the material itself. What Our Gearhead(R) Experts Are Saying:"I've laced these up for a long trail day and never felt a hot spot at the ankle. The thermo-shaped collar molds around the joint instead of just sitting there as padding."