{HEAD ~ The knit element} defines {TAIL ~ a portion} of an exterior surface of the upper and an opposite interior surface of the upper, with the interior surface defining a void for receiving a foot 
defines
{ HEAD ~ The knit element } defines { TAIL ~ a portion } of an exterior surface of the upper and an opposite interior surface of the upper , with the interior surface defining a void for receiving a foot
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH