Very briefly, let’s talk about what the shank of the winter hiking boots is. This is a supportive structure that is located between the outsole and the insole. Essentially, a shank is there to diminish the load that is incurred by your feet and also your calves. It is pretty much there, also, to protect the underside of the boot and to ensure that it retains its shape. So, look for shanks that are high in quality. The last thing you want is a cheap one that is not going to last.