The Pfanner Protos arborist helmet is the most advanced helmet system available on the market offering the best energy absorption, lightest weight, and unprecedented breath-ability. EN Certified side impact protection sets it apart from its competitors and makes it arguably the safest climbing helmet ever brought to market. Upgraded and improved to conform to ANSI standards, Pfanner replaced the koroyd of earlier versions with a grey foam insert. With the Pfanner Protos Helmet, you aren't just wearing comfort or head protection, you're wearing peace of mind.