The perfect helmet for any session with clean style just like you, the Liquid Force Hero Helmet is a functional and fashionable, CE-certified helmet that features a newly redesigned high-density ABS shell and sweat saver terry cloth liner. Bigger air vents and new art will keep you feeling and looking cool. Be a "hero" by staying safe and wearing a helmet while you rip.• Sweat-saver terry cloth liner for comfort and safety• 10-vent classic skate shell design• Impact-rated high-density ABS shell• CE certified EN 1385 watersports standard• Dual-density foam liner for 360° impact protection• Snaps for optional ear flaps (not included)Size Charttable, th, td {border: 1px solid black; border-collapse: collapse;}th {text-align: left;}th {padding-left: 6px;}td {padding-left: 6px;} Helmet Size Head Circumference Hat Size X-Small 20.1"-20.5" 6-3/8 Small 20.6"-21.3" 6-1/2 - 6-7/8 Medium 21.4"-22.0" 6-7/8 - 7 Large 22.1"-22.9" 7 - 7-1/4 X-Large 23.0"-24.0" 7-1/4 - 7-5/8 Sweat-saver terry cloth liner for comfort & safety Bigger air vents keep you feeling cool Dual-density foam liner for 360° impact protection