Double edge safety razors as we would recognise them today have been around for well over 100 years, with the first patent for the safety razor submitted in 1880. They would have been the razor of choice for your father or grandfather before the cartridge system revolution in the 1970s and 80s.
Recent years have seen a rise in popularity for this classic form of shaving for a number of reasons. Replacement double edge safety razor blades are considerably less expensive than the cartridge system alternatives, making them more economical for long term use. Only one blade and no lubrication strip tends to cause less irritation on skin prone to redness and itching after a shave. Also, due to the reduction in single use plastic, safety razors are better for the environment.
Double Edge Safety Razors are an excellent way to achieve a close, clean, and smooth shave without the unforgiving nature and difficult learning curve of straight razors.