(Photo not mine)
Most of the single blade razors that you will find offer a better shave than those that have the double or triple blades. You are using a razor that has the actual blade instead of something that has a piece of plastic between multiple blades. This allows the blade to cut the hair at one time instead of using multiple blades to go over the area at one time. When you use only one blade, you are saving the environment as well because you aren’t throwing away as much metal that won’t disintegrate. Ingrown hairs won’t show up as much, and you won’t have the rashes that you sometimes see with multiple blades.