Long walk-ins come before any climb, and the Scarpa Ribelle HD Mountaineering Boot stays stable through them with double-lasted construction and a full perimeter rand. HDry B5 is a bio-based polyurethane membrane that keeps water out of the boot. The 37. 5 lining pulls moisture vapor away from the foot before it condenses into sweat. What Our Gearhead(R) Experts Are Saying:"On approaches that ended at the snowline, I stayed in the same boots and put semi-automatic crampons on right there. One pair covered the whole day, from the trail to the climb."