A shaving brush is essential to getting a close and comfortable shave. The shaving brush is used with a traditional shaving soap or shaving cream to produce a thick and creamy lather to help soften the beard hair and protect the skin during shaving. The bristles work around each beard hair to lift and saturate with water. It is important to make a good form for straight razor shaving and the brush is your key instrument for this task. Getting the right amount of water in the lather is essential in getting the right thickness. Just mix in a few drops at a time until the lather is nice and foamy.