Evost Series Back Extension suna da ƙirar tafiya tare da nadi masu daidaitawa na baya, kyale mai motsa jiki ya zaɓi kewayon motsi cikin yardar kaina. Ƙunƙarar ƙuƙwalwar da aka faɗaɗa yana ba da jin dadi da goyon baya mai kyau a duk fadin motsi. Dukan na'urar kuma ta gaji fa'idodin Evost Series, ƙa'idar lever mai sauƙi, kyakkyawan ƙwarewar wasanni. Ƙafafun ƙafa biyu-biyu suna ƙyale masu amfani su zaɓi mafi kyawun matsayi na tallafi dangane da kewayon motsi, yayin da masu gefe biyu suna ba da ƙarin tallafi don ingantaccen kwanciyar hankali na horo.