NCF-Booster BraceFurutech original design, Hybrid multi material construction for improved sound quality.Not a Sound Enhancer – A Sound revealer!Nano Crystal² Formula (NCF).Incorporated into selected Furutech products, NCF features a special crystalline material that has two'active' properties. First, it generates negative ions that eliminate static. Second, it converts thermalenergy into far infrared. Furutech combines this remarkable material with nano sized ceramic particlesand carbon powder for their additional 'piezoelectric effect ' damping The resulting NanoCrystal² Formula is the ultimate electrical and mechanical damping material. Created by Furutech, it isfound exclusively in Furutech products.