Bern Macon Hard Hat Helmet Matte|Grey|w/Black|Buffalo|Plaid|Hunter, XL 5" high 9" wide Claimed Weight: [small] 15.7 oz, [xxx-large] 18.2 oz Audio System Included: no Fit Adjustment: micro adjust Adjustable Vents: no Ventilation: top vents, front vents, rear vents