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The techno 3 system dials in fit along the entire length of the shoe adapting the upper to the shape of the foot for a customized fit sidis famously reliable and replaceable closures are improved by an all new proprietary sidi wire material that is completely nonbinding for intuitive and effortless on the fly adjustments like most sidi small parts the tecno 3 system is serviceable and replaceable the soft instep closure system is a wide anatomically curved strap combined with a soft ther