Standards Approved Helmet Description The KASK Zenith Helmet is a non-vented helmet with a high density ABS plastic shell. The helmet meets the requirements of AS/NZS 1801 which makes it suitable for use in Australia. In addition to this standard it is also certified to EN 397 and EN 50365 (Class 0). This means that the helmet has an enhanced chin strap (making it suitable for work at height) as well as providing protection from electrical hazards to 1500V AC / 1000V DC. The KASK Zenith is known for its comfort and adjustability. It also has a wide range of accessories making it suitable for building and construction, industrial applications, production areas, arbor, forestry and agriculture.