Neoprene 3 : A synthetic rubber made from the polymerization of chlorophene, which is resistant to flame and various chemicals, including oil and gasoline; it was once commonly used in fire fighter protective clothing.
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}