The TL Series offers a customized fit courtesy of adjustable titanium core wires in the temples. Featuring patented GEKO™ technology for unparalleled retention on the roughest of courses, our world-class C3™ lenses and lens coatings and simple lens interchangeability, the TL Series delivers an uncompromising sport frame for training, racing and outdoor pursuits. Weighing in at only 22g, the TL-1x provides a 10% increase in field of view over the TL-1 at only a 1g penalty.