Bushwhacker

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The bushwhacker option is an additional .002 thick piece of TPU (Thermal Poly Urethane) we add at the feather-line (where the upper meets the sole). This helps make the area much stronger and less likely to fail for our running friends that are a little tougher on shoes. We have found only about 2% of our customers have a need for this and that's why we don't add it to every pair we build.