I can only tell you that I was very pleased with the cheap ones from Cycle Gear ($15 on sale). I don't bother with them often, but if I'm on a road trip and it looks like heavy stuff for a good while, I'll put them on. With the Harley rainsuit over them, they did the job. In my case, fit is very close. I wear size 14 boots and even the XXL gaiters barely fit.
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