Northwave Extreme Tech Plus shoes represent the maximum advance in mark Northwave road shoes. it is a model developed to deliver the best performance with a weight of only 235 gr. The extreme tech plus is the best combination of performance, design, aesthetics, technology and performance. all components of the extreme tech plus have been designed to offer maximum lightness. Slipper of competition. Ultralight shoe: 235 gr. Designed to offer maximum lightness. Closing slw2. Sole of carbon fiber to transmit the power of pedaling efficiently. Extreme air ventilation system. Lightweight microfiber construction. Recommended use with speedplay cleats.