The VERTIGE is a robust helmet with an ABS outer shell, designed for intensive use in a group environment, like on high ropes courses. The inner liner is suspended and easily adjustable with a strong and simple buckle. Designed to be durable and easy to wash. Neither the foam, nor plastic parts affect the helmet?ÇÖs robustness. Ventilated by 10 large vents and also equipped with headlamp clips to secure your lighting.