9 Portable gas tanks for use in self-contained breathing apparatus applications, namely, gas tanks specially adapted for self-contained underwater breathing apparatus and self-contained breathing apparatus for diving, fire-fighting, aeronautical, mountain climbing, skydiving and mining; portable gas tank systems consisting primarily of self-contained breathing apparatus and self-contained underwater breathing apparatus; accessories specially adapted for self-contained breathing apparatus and self-contained underwater breathing apparatus, namely, portable gas tank carriers, tank holders, pressure regulators, rebreathers, pressure gauges, pressure sensors, travel luggage, lights, plastic and rubber wire-braided hoses, dive computers, dive face masks, dive weight belts, life rafts, safety equipment, namely, safety personal locator beacons, buoyancy control devices, namely, buoyancy bladders, protective eye-wear; clothing for protection against injury and accidents, namely, face masks, fireman's suspenders, fire-resistant pants, helmets, safety helmets, safety helmet lights, defender visors, firefighter boots, fire escape clothing, gloves, turnout gear for firefighters, socks, reflective straps being integral components of clothing for the protection against injury, coats; protective body armor, namely, ballistic, bullet, blast, slash and stab resistant clothing