The surprising reason why some sneakers have fuzzy bottoms
The felt soles on the bottoms of the All Stars - and other imported soles - are a perfect example of "tariff engineering," explains the patent blog Gazetc.com.
Translation: The outsourced soles are specially designed to fetch a lower US import tax.
In this case, the special felt bottoms of the All Star cover more than 50% of the shoe's sole and allow it to be classified as a "slipper."
Here's the kicker: The tariff rate for for rubber-bottomed shoes is 37.5%, but classifying the shoe as a slipper lowers it to 3%. When you sell in the volume that Converse does, this adds up to a significant amount of savings.
Gazetc unearthed this weird fact after searching the patent code of the sole (6,430,844) on Google's patent searching engine. What comes back is not a patent for a shoe at all, but something that looks like - and is described as - a slipper.
US Patent and Trademark Office
Fortunately, the fuzzy bottom doesn't affect the performance of the shoe.
Though some have complained that their Chucks tend to be slippery out of the box, many have reported that the fuzz is not permanent and completely rubs after being worn for about a month.
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