La Sportiva's ski boots specialize in backcountry touring and the Vanguard Alpine Touring Boot focuses on powder. Not only is its construction light on our feet but it's also one of the few with an environmentally thoughtful design. Pebax's new bio-based TPE comes from a wide range of renewable resources. Add La Sportiva's stiffest flex a roomy last and a thermo-moldable liner and we're set to soar powder overhead all day long.*Manufacturer Disclaimer: The Vanguard is designed to the specifications for ISO 9523 standards and the certification is in process. ISO 9523 specified Alpine Touring Boots meet the compatibility specifications to work with Sole. ID and MNC bindings in addition to Tech/Pin bindings.