The 3M™ vented hard hat with pin-lock adjustment is engineered to provide comfort and protection to help keep DIYers and professionals safe. The shell and adjustable pin-lock suspension system work in tandem to help protect the head from possible top impact. The adjustable suspension sits low on the head to increase comfort and security. Personalize the fit with three levels of height adjustment. The vented design allows for more airflow, and the cap style is ANSI Z89.1 compliant when worn forward or reverse.