ok on the il moro's its stated by dalbello to have a vario flex. you can adjust how much the flex of the boot is by adjusting the slap ratchet. also flex ratings are a goofy guideline. flex can change in the same boot from year to year if they change what color they use for the shell. its a sick boot, much better flex rebound than the krypton pro's, and wit the ID silver liners, SICK. also heard that shane mcconkey has put over 120 days on snow last year in the il moro's and the liners didn't even need to be remolded.