Look to La Sportiva's Spitfire Alpine Touring Ski Boot for your all around ski mountaineering and speed touring pursuits. The Spitfire is surprisingly stiff on the downhill, considering how flexible and light it feels on the uphill. The shell consists of a low profile Grilamid outer for ultralight durability, and features Vertebra Technology, which employs a carbon reinforced polymer cuff to keep the boot stiff for the descent. The cuff also gives the Spitfire a killer 68 degree range of motion, resulting in plenty of agility while climbing on ice and rock or skinning up steep switchbacks. La Sportiva also equipped the Spitfire with a Speedfire closure system that works with the Cam Closure System's walk mode for a quick release when you switch from walk to ski mode. The QuickBuckle and EZ Cable ensure a secure fit while skiing that doesn't inhibit the boot's flexibility on the hike up. Inside the boot, you have a removable SkiMo thermo moldable liner and WarmSole insert, which make the Spitfire one of the warmest two buckle boots on the market. Despite a relatively wide last, a 2BT Tech Heel minimizes the volume around your heel for a precise fit, too, because nothing's worse than slopping around inside your boot when you're trying to lay down aggressive turns in mixed snow.