British Orthopaedic said Dr. Ian Dean, UGG snow boots used are very soft material, your internal space is actually comparatively large, put it on the back foot in there will always be any specific sliding, every step of your approach, gravity will always be along your foot for you to spread all around, so that your arch bigger impact, and thus your foot, ankle and even hip injury.
ugg 3220 http://www.doremo.jp/ugg24508.html