Fools pass is when you shave the area between your upper lip and nose from the upper lip upwards against the grain.
It can be done, but if the razor slips it is usually arrested by your nose with obvious results.

With respect to safety razor blades, the most obvious differences arise from blade thickness and the way the edge is ground.

Some brands become very popular only to fall from favour (e.g. Derby blades) quickly, while Astra and Feather blades by comparison remain as popular as ever.


B.