The main body is preferably formed from a compressible material such as silicone, the material being sufficiently malleable...http://www.google.com/patents/US20040055603?utm_source=gb-gplus-sharePatent US20040055603 - Intra-nasal filter deviceAdvanced Patent SearchPublication numberUS20040055603 A1Publication typeApplicationApplication numberUS 10/251,868Publication dateMar 25, 2004Filing dateSep