A safety razor is a more modern form of a straight razor that uses disposable double edge razor blades. they feature a single edge blade on two sides and give a much closer shave than a cartridge razor with near straight razor performance. The advantage of safety razors is that the blades cost around $0.10 - 0.20 each and you save a decent amount of time over using a straight razor for the same process. The high end safety razors have an adjustable head that allow for a more custom shave experience. We can't recommend these enough!