Using these United Shield level III+ shields is straightforward. First, adjust the custom arm pad on the multi - functional handle to fit your arm comfortably. Whether you're left - or right - handed, the ambidextrous design allows you to hold the shield easily. If you find the shield heavy, attach the optional neck strap to help distribute the weight. When using the shield, keep in mind that it's designed for multi - hit protection, but avoid excessive impacts that could damage it. As for maintenance, clean the shield regularly with a soft cloth. The hard - wearing rubber trim helps protect the edges, but check it periodically for any signs of wear or damage. Store the shield in a dry place to prevent any moisture - related issues.