Viasit Core Ergonomic Chair - NiodonlineThe Core Ergonomic Chair by Viasit Active Sitting for a Healthier Workday 4 Looking for an ergonomic office chair that does more than just support your back? The Viasit Core Chair is a revolutionary active seating solution designed to strengthen your body while you work. Unlike traditional static office chairs, The Core encourages dynamic sitting, activating your muscles through subtle, continuous micro movements that improve posture, circulation and