Yellow and Black Forestry Cap Style Safety Helmet and Hearing Protection by TR Industrial®. This 5 in 1 combination safety helmet provides dynamic protection in all sorts of tough work situations such as when using chainsaws, brush cutters, and trimmers; it is ideal for forestry type work. The job needs to get done, but you need to be safe. This Combination Safety Helmet secures firmly on the head and comes with a convenient dial knob, making it easy to adjust headband circumference.