The Vertex Best helmet sets the standard in head protection for workers at height. The adjustable head band ensure a secure fit, whilst the strong chin strap limits the risk of losing the helmet during a fall. The solid shell reduces ventilation but does meet the requirements of EN397 and EN50365 for electrical insulation and molten metal splash. This helmet is a compromise between the sport and industrial standards. It meets the sport standard requirements for chin strap strength and the industrial requirements for protection against falling objects. The helmet is compatible with a wide range of ear defenders and visors that fit a standard 30mm euro slot.