THE Industries Arcus Mountain Bike & Enduro Helmet Quick and convenient, 3 position vertical dial adjustment with Deep 3/4 rear coverage give you maximum protection to keep you safe while you ride CPSC/CE/AS/NZ Certified; know you are well protected The Arcus mountain bike helmet is a stylish and affordable Enduro style half shell helmet. The lightweight design has 6 Massive Intake vents and 17 exhaust vents; keeps your head cool when you are working hard Sized Large/extra large 58-62cm weighing in at 320g; Gloss blue on Gloss Black