The Nordica Transfire R2 Ski Boots are designed to be a little more comfortable than the high performance Firearrows You still get the precision benefits but with a slightly softened flex and increased last width The flex on the Transfire R2 is progressive so the more force you apply (as you ski faster and more aggressively) the more the boot stiffens It also rebounds quickly so you can transition between your edges The positioning of the 3rd buckle isnt an accident It provides maximum heel hold and also makes it easier to get in and out of your boots Specs Flex Rating Progressive up to 100 Last Width 102mm Skill Level Advanced and Intermediate Features Dynamic progressive flex stiffens as you deepen the flex for more support 45 deg buckle placed at instep for better heel hold and easy on/ off Quick rebound for better power transmission to the ski Dual density PU sole for good grip 3 microadjustable buckles let you dial in the fit Double canting lets you get a balanced and natural stance Soft padded tongue for comfort on your shins PFP Performance Fit shell