In this audio recording titled "Zipper Number 4", the dominant sound is that of a zipper being unzipped, the metallic teeth separating in a slow, deliberate motion. The audio takes an alternate approach, focusing on the everyday, often overlooked sound of unzipping a coat or jacket. The audio is so crisp and clear, making it seem as if the listener is right there, experiencing the unzipping in real-time. The recording is part of a larger environmental sounds research project, aiming to amplify and study the sounds we encounter in our daily lives. The zipper sound, in its simplicity and familiarity, is presented here in an artistic and scientific context, reminding us of the complex beauty in the mundane.