Built to reach the summit in a range of mountaineering crampon designs Merrell's waterproof and rugged Expedition boot is essential foot support and protection for those who spend weeks in the remote backcountry. Beneath the quality 3-mm. Perwanger Nepal leather upper is a breathable and wicking Microguard™ mesh liner with Outlast™ for superior moisture dispersal. Merrell's Easy Rollers II stainless steel ball bearing lacing system locks in a secure fit the way you like and a durable and aggressive Vibram® Expedition™ sole with deep 8-mm. lugs inspires confidence in high spaces where you need it most. Despite being a mountaineering boot the Expedition features Merrell's traditional hiking boot last so it fits best with midweight socks or your favorite combination of midweight socks and wicking liners.