Proximity Fire Fighting Protective Trouser : The element of the protective ensemble that provides protection to the lower torso and legs, excluding the ankles and feet
NFPA 1851 Standard on Selection, Care, and Maintenance of Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting, 2008 ed. http://www.gearwash.com/pdf/NFPA-1851-2014-Edition -List-of-Changes.pdf, (Std: Selection, Care and Maint of Prot Ens for Stru Fr Fight and Proximity Fr Fight - Amer) {411 NFC}