A jacket of the type used by firefighters as protective garment. 1 to 10% by weight carbon particles, wherein the particle size of the carbon particles ranges from 0. Advantageously, the present invention may penetrate into increasingly small geometries of highly integrated devices and may also be used for general wet etches of dielectric material in conjunction with photoresist. The wireless handset may additionally include features for supporting and enhancing direct communication between handsets.