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everything on them has a purpose. they're all pretty self explanatory really. the buckles are obviously to eliminate any chance of the boot coming off of your foot in a crash, the heal cushion things such as on Sidis absorb energy in a crash, shin plates protect the shin in a crash, toe sliders keep you from wearing away the boot so your toes stay in, the side bracing is to keep your ankle from flexing in the wrong direction in a crash, and so on. what feature can't you figure out?