Perfect synergy between technology and design. - Outer shell in polycarbonate and ABS composite, and EPS skull cap (expanded polystyrene), the best guarantee for protection against shocks. - Perfect ventilation: 5 stainless steel airing vents spread around the helmet and 2 air intakes built-in the top area inside the side piping ensure continuous airflow. The helmets conforms to European VG1 01.040 2014-12 standards, with a TÜV Rheinland Certification and PAS 015 2011 standards, with a BSI Assurance Ltd Certification. They also conform to American ASTM F-1163-15 standards, with SEI Certification. If your size isn't in stock we can order this for you. please allow 7 - 10 working days for delivery.