LS2 Advant FF906 180 degree Flip Front Modular Motorcycle Helmet is the most versatile helmet on the market today. The designers at LS2 took a popular concept, 180 degree flip, and designed a totally new and unique mechanism, allowing the Advant FF906 to be the smallest, lightest helmet of its kind on the market. Product Specification: SHELL -Certified ECE 22.06 -1700 ±50 - XS-2XL - KPA -DTI approved BPS Sticker SECURITY - Micrometric Metal Buckle -Safety Reflectives Patches -Reinforced Chin Strap HELMET SIZING *Approximate measurement - fitting is dependent on helmet shape, head shape, and overall facial contours *Measurements indicated are based on forehead diameter measurement *Helmet inner linings will expand and contour to wearers head upon 1-2 weeks of usage   *We can help with determining you size *SIZE CHART (approximate only, depending on helmet models) M - 57m-58cm L - 59cm-60cm XL - 61cm-62cm XXL - 63cm-64cm   HOW TO MEASURE: Wrap a measuring tape around the fullest part of your head - this will just be above the ears and about a half-inch above the eyebrows for most - and take the measurement at the forehead. Take the number found above and go to the size chart for the motorcycle helmet being viewed and find the helmet size which includes this dimension in its sizing information.   WHAT'S IN THE BOX: 1x helmet w/ visor 1x helmet pouch 1x instruction cards 1x Antifog Film 1x Bag Pack DETAILS *Checked and wrapped properly for secured shipping. *Please message us for more inquiries. We will gladly assist you  *FOR ANY CONCERNS ON YOUR PURCHASE, PLEASE SEND US A MESSAGE AND WE WILL ADDRESS IT IMMEDIATELY   RIDE SAFE PO! =)