Built from tough, durable polycarbonate the Exustar E-BHM106 is fully compliant with both CE & SPSC safety standards. An adjustable ratchet wheel & locking buckle provides a high level of adjustability helping you to find a perfect fit while the bug mesh helps keep insects out of your head. 26 vents, place in strategic positions provide a high level of air flow helping you stay cool & calm on hot summer days. The large, blade visor helps block unwanted sunlight from obscuring your vision yet is removable for when its not needed.