How to use: First, put on the vest like a regular jacket. Use the durable nylon straps and Velcro closures to fasten it snugly around your body. Adjust the commercial - grade elastic adjustment straps to fit your body type. Notice: Avoid sharp objects that may puncture the outer shell. Do not expose the protector to high - temperature or highly acidic environments for a long time. Maintenance: Clean the protector with a soft, damp cloth regularly. Let it dry naturally. Check the Velcro closures and straps frequently for any signs of wear and tear, and replace them if necessary.