Coast Ropes and Rescue - Stay cool with Petzl's VERTEX VENT helmet. It's ventilation holes with sliding shutters allow airflow through the helmet. Add a VIZIR SHADOW eye shield for
VERTEX® VENT HI-VIZ, Comfortable, ventilated high-visibility helmet - Petzl USA
Petzl Vertex Vent Helmet | The Height Safety and Rope Access Shop
Etra Oy - Visor Petzl Vizir EasyClip Dual
News - Petzl Everything you need to know about accessorizing VERTEX and STRATO helmets - Petzl USA