Soft, lightweigh, SilcoSoft is an advanced fiber with outstanding acoustical performance at temperatures as high as 1200°C (2000°F). Unlike other silica products, SilcoSoft features a unique cotton-like touch and easyly conforms to irregular shapes/ This remarkable material is non-dusting and non-irritating andits 9 micron diameter fiber is non-respirable, which means handling SilcoSoft is safe and easy.