I buy 1 pair/year and toss the crummiest pair. I have about 8 pair in my drawer. They're all different because manufacturers change or bring out models at least once/year. It's nice to change the nip on one's butt and try different ones. Over the years, one develops a sense of what's going to work well and which manufacturer's products are more durable. PI Elite and above and high-end Voler have been more durable.
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Results matter