Our Syncro series are leaner, lighter and faster than ever before. The Syncro 12 features our AirSpeed™ backsystem and a LightWire™ frame, taking ventilation to the next level, while featuring an innovative open-yoke to promote maximum airflow along the back. Equipped with a ventilated performance-fit BioStretch™ harness to further increase airflow; even on the hottest rides, hikes or trails, you'll enjoy incredible ventilation and load stability.