By allowing the sound to pass through several individual layers, the PF01 gently diffuses the acoustic waves surrounding the microphone, keeping the sound from bouncing back toward the microphone, which improves the detail and sonic character of your recordings. The best thing about the PF01 is that it easily mounts to any mic stand, so you can take your acoustic treatment with you any where you need to record. The PF01 costs a fraction of what it would cost to treat a room acoustically, and will dramatically improve the sound quality of your recordings.The PF01 allows you to record vocals, guitars, or any other sound source with a 'drier' sound without having to have an acoustically treated room. It's portable, and uses state of the art materials