Warrior Helmet Combo Alpha One True One ShellThe sturdy one-piece plastic shell offers maximum protection despite the extremely lightweight construction. Due to the special geometry of the shell, the force of the external impact is optimally distributed and minimized. OmniShock+ Protection System w/ Viconic InsertsSafety First - the complete construction and focus is on maximum protection of the head Strategically placed cushioning plates (VICONIC) provide targeted protection against harder impacts to sensitive areas such as the temples, the back of the head and the forehead area. The VICONIC system absorbs different linear and rotational forces. Several materials and protective cushions are responsible for absorbing and minimizing the forces acting on it. The True-Onepiece plastic shell and the EPP protective pad are the most important factors for the high protection function against serious injuries The combination of the Impax Soft-Touch foam pads with the Viconic cushioning plates are special elements for targeted protection against medium and large forces. In summary, the OmniShock+ system provides absolutely high-quality protection and comfort for every level. AdaptFit 360 by BOAPfect adjustment with the 360° AdaptFit. Thanks to the 360° BOA system, the helmet is optimally adapted to the head from all sides in a matter of seconds. This guarantees maximum comfort with maximum protection Flow Comfort Polygiene Liner and VentingOur interchangeable Velcro pads are treated with Polygiene. This prevents the formation of bacteria and germs, dries faster and gives a cool feel. The air circulation through the shell has been optimized to avoid overheating. Pads are washable and can be purchased individually. Color CustomizationEach helmet comes with a sticker set to customize it. Alpha One Combo Alpha ONE Combos come with the premium Alpha One grid in silver. Head circumference:Size S: 52-56 cmSize M: 56-59 cmSize L: 57.5-62 cm