The Protos arborist helmet from Pfanner is the most advanced helmet system available on the market offering the best energy absorption, lightest weight, and unprecedented breath-ability. The side impact protection sets it apart from its competitors and makes it arguably the safest climbing helmet ever brought to market. • Field of vision is optimized because of the swept back design • 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. • Features discrete channel for the included chin strap 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. • Designed over a 15 year period with two things in mind: total head protection and working arborists