The lightest 4-buckle Alpine Touring boot on the market, the Spectreachieves the greatest range of cuff rotation in their class. The patented design allows a full 60 degrees of ankle movement and the Vertebra construction adds support for downhill performance. The exclusive, low-profile Pegasus buckle system allows macro and micro adjustability for a precise fit. The EZ Flex tongue is designed to work seamlessly with the EZ Flex Liner so that inner and outer boots mesh cleanly while walking or skinning. Shell: Grilamid®. Cuff: Pebax®. Spoiler: Marfram®. Vertebra: Carbon-reinforced Grilamid®. Tongue: Grilamid®. Closure: 4 Pegasus buckles® with optional power strap. Liner: EZ Thermo. Positions: 3 preset forward lean options (10°, 14°, 18°). Range of motion: 60°. Flex: 110. Compatibility: with all "Tech-Style" and AT bindings. Sole: Vibram.