We had just made a costco run and I was putting away some Irish Spring in the Bathroom. I had a strange idea. I thought it would be interesting to see how well this soap would lather up with my badger brush. After reading the ingredient list (it is a tallow based soap) it contains many of the same ingredients as my shaving soaps. I decided to whip some up to see what would happen. I was surprised to see the amount of lather come out of this soap. If I hadn't already shaved today I would have given it a try. So my challenge is this if you are so daring, to take whatever bar soap you have and attempt to shave with it and then report back on the results. I will shave with Irish Spring tomorrow and let you know how it performs. It would be interesting to see what bath bar soaps may also work well as shave soaps. Travis.