3 outer shell sizes TCT Thermodynamical Composite Technology: Extremely light, having reduced the weight of the new Exo-1000 Air by nearly 250 g, the new TCT structure provides a level of protection as yet unseen in the world of helmets. This smart shell is able to gradually crumple on impact, which allows it to absorb most of the energy generated by the shock, while retaining one of the strongest structures. KWIKWICK3 LINER: Very effective, hypoallergenic, removable, machine washable, and very soft and pleasant to the touch, the KwikWick3 lining of the new ScorpionExo 2011 range is a real custom-made slipper for your head. AIRFIT CONCEPT: Airfit? permits a rider to personalize helmet fit through air adjustable cheek pads with additional noise reduction.Only by Scorpion EXO. SpeedView?: An internal retractable sun visor that eases eye strain instantly in varying light conditions without changing face shields. Pinlock MAXVISION: Fitting perfectly into the specially depressed area of the faceshield, the Pinlock creates continuous air pressure through the compression force, which in turn stops condensation ? and thus fogging ? from occurring even when the temperature difference between the outside and the inside of the helmet increases. Shield lock system: a 3 position lever allows to lock the shield in closed or slightly opened position. Ventilation system: Adjustable, indexed front and rear vents with aero-tuned rear spoiler reduce lift, create vacuum and maximize airflow through helmet. Breath-deflector: Enhanced fog-free performance. Chin-cover: contributes to noise reduction. Closing chinstrap by double D ring.