Fine Synthetic Angel Hair Classic Shave Brush.
This is both my cheapest and my favorite brush. When I say cheap, I mean it in both senses of the word. I think I paid less that $20 for it. When it arrived I noticed that many of the hairs had been put in upside down: the soft tips were embedded in the handle and their prickly ends were positioned to rub against my face. What's more, the knot was set crooked, so that it looked like the leaning tower of Pisa. For a year, maybe longer, I refused to shave with it. Instead I used it to dust my computer keyboard or the picture frames in my office. Only when I starting using it to make test lathers from some difficult soaps did I discover how wonderful this floppy, ill-wrought brush really is. It makes superlative lathers. Its loose construction lets in plenty of air and water. When the lather's formed it releases the suds quickly without crushing them against my face. And the misplaced fibers have grown softer, though I still get a prickle from time to time.