Using these shields is straightforward. First, adjust the custom arm pad to fit your arm comfortably. Then, hold the multi - functional handle firmly. Whether you're left - or right - handed, the ambidextrous design allows for easy use. If you find the shield heavy, attach the optional neck strap to relieve some of the weight. When using a shield with a viewport, make sure to keep it clean for a clear view. As for maintenance, regularly check the rubber trim for any signs of damage. If it gets dirty, you can gently wipe it with a soft cloth. Avoid exposing the shield to extreme temperatures or sharp objects that could damage it.