How To Wear: A BUMP CAP OR BUMP CAP INSERT MUST BE WORN AT ALL TIMES WHEN WORKING ON OR AROUND AN AIRCRAFT. SANNA (TECHOPSSLC) IS WEARING THE COTTON TEE AND A BUMP CAP. WHEN WORKING ON OR AROUND AN AIRCRAFT, WEARING A SAFETY VEST IS REQUIRED. FOR PURPOSES OF SHOWING THE UNIFORM, SANNA IS NOT WEARING A SAFETY VEST IN THIS PHOTO.