In reply to johno072: More likely you will snap a Tib or Fib using a Cumbre... The release from a binding that will be capable of taking this boot will be inadequate at best - no toe release coupled with inadequate ankle support will direct all of the force to those rather weak bones in your lower leg... Ouch!!
Get a basic 2 or 3 clip ski touring boot - it won't be any worse to walk in than the Cumbre (which is awfull compared to modern B3 boots - the sole is too stiff and way too flat), and will climb just as well if not better...
It really is not a good idea to get this wrong - people do the most stupid things and 'get away with it' - when you don't get away with it, it feels pretty stupid being carried off the hill or worse case being flown off the hill