welting

from The Collaborative International Dictionary of English v.0.48

Welt \Welt\, v. t. [imp. & p. p. {Welted}; p. pr. & vb. n.
   {Welting}.]
   To furnish with a welt; to sew or fasten a welt on; as, to
   welt a boot or a shoe; to welt a sleeve.
   [1913 Webster]