Dear George, I am going to answer a full length shank, have done some serious long walks in hard country and there is still no give or twist in the
footbed, only total support of which i am really impressed with, hope this helps with your decision,
Kind Regards d3scameraman.
According to their website, half shank.
sorry goalie, I have no idea! sounds like a question for the manufacture.They have a more than average rigidness, but I don't mind