Lowa Men's Baffin Pro Backpacking Boot,Chestnut/Anthracite,9.5 W US 100% Leather Vibram sole Climate Control System perforations C4 anatomically contoured tongue FlexFit ankle flex and heel fit 5mm full-length nylon shank Strap-on crampon compatible Ideal for demanding backpacking adventures, Lowa offers a non-Gore-Tex version of the Tibet boot for dry climates.