September
Razor for SR ( Straight Razor)
Having said that, I've never seen the point on these themed threads, I'm sure for some people these,
OCtober or using a single soap for a month, are a lot of fun ideas but if you have a bunch of soaps then obviously you enjoy variety, the same goes for razors, after shaves, brushes, etc. So why would you want to punish yourself for a month? Unless you are trying to prove a point to yourself that you only need a particular razor or a particular type of razor, brush, soap, etc.
For me, shaving with the same soap, same scent, same brush, razor, etc. everyday just doesn't appeal and for that reason I won't be investing, I'm out!