I recently got the t.akustik PET Wall Absorber 120 WH, and I'm happy with it. It cuts down on echoes, making my room sound much clearer.
The design is simple and modern, and it's easy to install. Plus, it’s eco-friendly since it's made from recycled PET. A great choice for improving your sound
Important: It works well for mid and high frequencies, but it doesn't do much for bass. For good bass, you'll need thicker treatments, and this is true for all "thin" solutions.