AFX- FX-44 Adult Open Face Helmet - Features an aerodynamic shell design constructed using an advanced lightweight composite poly-alloy - Features a hypo-allergenic and anitmicrobial nylon helmet liner and cheek pads; all of which are removable and washable - Features a removable screw-on visor - A flush-fit, quick-release, single-turn screw face shield with side covers. The shield itself is optically correct, compound-curved, scratch-resistant and protects against UV-rays - Features 2-point ventilation with forehead and top vents - Features a square type D-ring with chin strap holder - Provides ample ear cavity space for speakers - Clearcoat finish protects helmet paint and graphics, and provides a great shine. How To Measure For An AFX Helmet: Using a cloth measuring tape, measure all the way around your head at the largest point. This will give the circumference of your head in inches that can be matched to the proper size helmet below. Adult Size Helmet Fitment Chart: Small: 7 - 7 1/8 Hat Size (22 - 22 7/16