The Sideral 2.0 Ski Mountaineering boot is back from La Sportiva and picking up right where the old boot left off. New features on this boot include new buckles (Pegasus buckles like those from the Spectre), a newer last akin to the Spectre to accommodate various foot sizes and the boots come with an adapter that allows the boot to fit into frame bindings or tech bindings. The boots still feature the Fast Lock closure system and thin liner. These are great all arounder boots, perfect for introductory level racing, touring, or running fitness laps. The improvements make this boot a solid contender in the "best all arounder" boot category.