I have been working in foot biomechanics and footwear fabrication for thirty years. One thing that I have witnesses over and over is the impact protection we get from wearing a quality custom insole. The tissue in our heel pad is some of the most effective and properly thought out and fabricated custom insole can harness this 'natural' power. Hiking wise it has the ability to totally align the skeleton leading to more benefits and that could help with 'crash outcomes'. This investment is inexpensive and great passive insurance.