Petzl 

• Integrated hearing protection with low-profile design (no prominent parts to get caught on branches).
• "Swept back" design of the helmet allows for optimal field of view
• The adjustable pressure fitting of the hearing protectors allows for a perfect fit.
• Even weight distribution design and the adjustable neck piece allow for a perfect, secure and comfortable fit, even without the chin strap.
• Adjustable vent flow on helmet (vents can be opened or closed) allows for use in wet, hot or cold work conditions.
• Discrete channel for the chin strap was designed to prevent the chin strap from slipping under the ear protector.
• Extraordinary wicking of perspiration via large and exchangeable pads with Klima-AIR technology.
• All functions of the helmet (hearing protection, face shield, helmet adjustment, and helmet vents) can be activated with just two fingers... making operation of the helmet easy.
• One of the only arborist helmets offering side and rear impact protection.
• Designed over a 15 year period with two things in mind: total head protection and working arborists
• Includes chinstrap for work aloft
• Certified to EN397 and EN 12492