Designed with the input of Scarpa athlete and speed demon Ueli Steck, the crazy-light Scarpa Rebel Pro GTX Men"s Mountaineering Boot moves so fast it seems to hover uphill. This boot, the lightest-weight insulated boot in Scarpa"s Tech Mountain category, features a Gore-Tex Insulated Comfort lining to keep your foot warm and dry. The tongue is constructed with Gore-Tex Insulated Stretch fabric for a smooth, bunch-free fit and assured protection at this closure, as well as excellent breathability. Black ice" Frozen waterfall" No problem. The Rebel Pro is automatically crampon-compatible thanks to TPU inserts in heel and toe. And with its carbon-fiber insole and Tri-Density PU shock-absorbing midsole, this boot keeps its weight to a minimum while providing hardcore support on technical climbs. Vibram"s TT Lite outsole withstands rugged alpine wear and tear and features a grippy toe climbing zone. Packed with features, strong, and feathery, this boot passed muster with Steck, and it will with you, too.