Using this EzyDog harness is a breeze. First, place the harness over your dog's head. Then, fasten the buckle around your dog's chest. Adjust the straps to ensure a snug fit, but make sure it's not too tight to avoid discomfort. When using the free car seat restraint, attach it to the D - ring on the harness and secure it in your car's seat. For safety, always double - check that the harness and restraint are properly fastened before taking your dog out or going for a drive. As for maintenance, simply hand - wash the harness with mild soap and water. Let it air - dry completely before using it again. Keep it away from sharp objects to prevent damage to the reflective stitching and the EVA foam chest plate.