[pct-l] instep crampons

[goforth at cnw.com (Joanne Lennox)]

If you are going to use instep crampons, be very careful to test them first 
with the foot wear that you will use and on a snow slope similar to the one 
that you will want to traverse.

You might put them on, get on the snow slope and walk along the edge and 
come back

In step crampons are notoriously poor at staying on, especially where the 
surface is hard and causes them to flex and bend.  a flexible shoe 
aggrevates the problem.

worse than not having crampons, is having them and using them to get part 
way across a icey slope and having them come off.  There is no place to 
stand in order to put them back on, and you can neither go forward, nor 
backward. This is not a theoretical consideration, it is something that 
happens, and requires rechecking at intervals.  Never step onto an icey 
slope with loose crampons.