Adidas retro Plug tech?

Joined Aug 8, 2008
Can anyone explain what was the tech behind the adidas Plug tech? I know its 1884 retro but what was the purpose of plugs? they look like golf tees stuck into the midsole!
Joined Nov 25, 2003
If I remember right, they were of different densities so it was like changing the softness/stiffness of your shoe. I remember there was a full page ad for the retros in like Slam back in the day.
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