welt 
(wĕlt)
(wĕlt)n.
1. A strip, as of leather or other material, stitched into a shoe between the sole and the upper.
2. A tape or covered cord sewn into a seam as reinforcement or trimming.
3.
a. A ridge or bump on the skin caused by a lash or blow or sometimes by an allergic reaction.
b. A lash or blow producing such a mark.
tr.v. welt·ed, welt·ing, welts
1. To reinforce or trim with a welt.
2. To beat severely; flog.
3. To raise welts or a welt on.
[Middle English welte.]
weltpillow with welt trimming