The MAKALU is a heavy duty lightweight mountaineering boot that will take you anywhere you want to roam. Traditional one piece 3mm silicon impregnated rough out leather construction is highly weather resistant, breathable and is molded to rugged La Sportiva MPE Sole. Fine tuning for fit and boot volume is a breeze with adjustment for volume via EZ Flex Toungue and foot retention by Easy Roller lacing system and EZ Lock D Rings - to hold your foot comfortably and securely. Trail and cramponing comfort is provided by a breathable Dri-Lex lining, SBR Aircushion midsole and 8 mm Mountain Flex Midsole with full 1.5 mm steel shank. The "one boot" you can use for serious backpacking, glacier travel and some alpine ice. Favorite of NOLS and Outward Bound Instructors as well as utility company employees and smoke jumpers... Sound burly enough? Delivered anywhere in North America.