Using the Quad Lock Poncho for your iPhone 11 Pro Max is a breeze. Just slip it over your phone when you're in a muddy, dusty, or rainy environment. When you don't need it, you can simply fold it up and put it in your pocket or bag. Since the TPU material is durable, you don't have to worry about it getting damaged easily. However, try not to use sharp objects on the poncho as it might scratch the TPU. To maintain it, just wipe it clean with a soft cloth if it gets dirty. This way, you can keep using it to protect your phone for a long time.