3 ms·

Have there been any cases under this rule about "incorporates springs"? I mean for things which might vaguely count as running shoes... not oscar pistorius etc

• fenwick67 8y ago
  This is funny to me because there's nothing magical about a metal spring - the sole of every running shoe is a "spring" in that it has a spring force that helps you run.
  • deleted 8y ago
    [deleted]