Unlike other integrated expedition boots, the G1 Expe has an outer boot hand crafted from breathable 2.8 mm split leather - for the same great fit and light weight as your single mountaineering boots. As we all know, leather conforms best to the foot and the fit gets better with each use. The outer boot uppers are lined with cordura backed by waterproof breathable Sympatex and two layers of EVA foam insulation - perforated for breathability. Multiple layers of Radoma insulation are alternated with the EVA and triple thickness Thinsulate and twin layers of 2mm Neoprene - to assure adequate warmth - in the coldest of climes. Heat loss from the ground up is kept at bay with an extra-rigid, technical midsole and a 10mm dose of EVA which also provides excellent, additional shock absorption.
The G1 Expe's Inner boot is slip lasted (just like rock shoes) with waterproof split leather on collar and tongue, a padded Achilles with adjustable velcro-elastic strap (for comfort and heel retention) plus a unique raised heel that keys into a corresponding cavity in the floor of the outer boot. Materials include durable Cordura outer, W/B Sympatex, Thinsulate for warmth and an efficient wicking Dry Line inner surface.
MOUNT FDS-3 outsole is crampon compatible and co-molded with external rubber rand which protects outer boot and integral waterproof-breathable gaiter - which is secured with zip and velcro closure.
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Sizing: If a US 10.5 fits well in a hiking boot, then order a UK 10 for a similar fit.