The audio begins with the unmistakable sound of a zipper being unfastened, the teeth clicking apart in a quick succession. This is followed by the rustling noise of the backpack's fabric, indicating that the backpack is being opened and its contents are possibly being moved around. This sound is a combination of the rustle of the material and the shuffle of items inside, creating an authentic foley effect. The audio then transitions to the sound of the zipper being fastened again. The repetitive clicking of the zipper's teeth coming together is heard, creating a distinctive sound that signifies the closure of the backpack. The rustling of the backpack's fabric decreases as it is zipped closed, indicating the end of the activity. The audio ends, leaving a vivid impression of a simple yet relatable activity - opening and closing a backpack.