With a sleek and fast look the echelon helmet presents a compact profile on a rider39s headand with increased ventilation and an ergonomic design you39re guaranteed an exceptional fit tremendous comfort and ample ventilation accordingly it39s the ideal helmet for road cycling enthusiastseasy adjust headset sl ii fit system with six height positions and micro adjustable dial4th dimension cooling system optimizes ventilationcomposite matrix internal reinforcement allows larger vents f