Using the 3M SecureFit X5012 Black Safety Helmet is easy. First, adjust the vertical suspension system to fit your head comfortably. You can do this by using the available multiple levels of adjustment. Then, fasten the 4 - point chin strap. If you're in a mountaineering situation, use the chin strap selector to switch to the EN 12492 standard. For industrial work, switch it to the EN 397 standard. When wearing the helmet, make sure it sits firmly on your head and doesn't move around. Always check the helmet for any signs of damage before use, such as cracks or loose parts. If you find any issues, don't use the helmet and replace it immediately. To keep the helmet in good condition, clean it regularly with a mild soap and water. Avoid using harsh chemicals as they can damage the helmet's material. Store the helmet in a cool, dry place away from direct sunlight when not in use.