DESIGN:the world's most technically advanced helmet with the innovative aluminum upper ventilator assisting in more rapid air to impacts. ADJUSTMENT: the VELOX SIZE SYSTEM with a single size adjustable from 53 to 61cm allows for vertical adjustment eve during use. VENTILATION: exceptional internal ventilation thanks to the 23 vent system augmented by the use of the aluminum ventilator. INTERIOR: inside padding made of a single removable and washable piece of transpirant COOLMAX with Sanitized antibacterial and antifungal treatment. WEIGHT: 240 grams, with ventilator: 260 grams.

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