<p>The helmet shell of the RPHA 11 is made according to the P.I.M. 
construction (Premium Integrated Matrix), a technical fiber mix of 
Carbon / Kevlar and Fiberglass for maximum safety and durability. 
Aerodynamically optimized in HJC's own wind tunnel so that no lift 
occurs at higher speeds. 3 helmet shells for optimum fit and comfort. 
Superior ventilation, perfect for trackdays when you need that extra bit
 of oxygen / ventilation! Double ventilation channel on the chin and 
forehead. Removable and washable liner from Multicool, which is very 
comfortable to wear and does not sand. Emergency cheek pads for safe 
removal of the helmet in the event of an accident. Rapidfire ™ visor 
mechanism for quickly changing the visor without tools. Visor Pinlock® 
and Tear-Off prepared. Double D chin strap closure. Including dark 
tinted and clear visors and Pinlock lens. 1300 grams (+ -50). Standard 5 year 
warranty.<br></p>