The STIHL Function Basic Helmet System can help protect you during chores using outdoor power equipment like chainsaws and pole pruners. A vented helmet shell provides air circulation while a six-point pinlock suspension makes for a secure fit and shock absorption. The helmet system also features a slim design to reduce snagging risks. The Function Basic Helmet System is Class C certified and includes NRR 22 hearing protection. At 1.6 pounds， the helmet system is a good weight for comfort.