Performance, Style and Comfort. Karma’s S-Ergo 125 is equipped with the unique S-Ergo shaped seat. The S-Ergo seat provides pressure relief and prevents the user from sliding forward. In addition to Karma’s patented S-Ergo seating system the Ergo 125 also has seat upholstery and pads treated with Aegis Microbe shield, to reduce stains and odor. The streamline oval tubes not only make the wheelchair look great but also add to the strength of the wheelchair structure, which is incredibly light. Made from aircraft aluminium the frame breaks down to just 11kg.