60 grams lighter, per pair, compared to Ergo 3. All new Tecno 3 buckles independently adjust fit across the forefoot and toe. Improved Vent Carbon Sole®: Same incredible stiffness with closeable vents. Adjustable Heel Retention Device® eliminates heel lift. New Comfort Fit insoles with memory foam for lightweight support. Lighter, more ergonomic Soft Instep Closure SystemÂ® and padded tongue eliminate pressure points.