Air-cooled riding. Arrive at your destination cool, calm and collected. Our Syncro series are leaner, lighter and faster than ever before. Taking ventilation to the next level, the Syncro 15 features our AirSpeed™ backsystem and a LightWire™ frame. The pack also has a ventilated BioStretch™ harness further increasing airflow meaning that even on the hottest rides, you’ll enjoy incredible ventilation and load stability.