The Pinegrove MS50 Mandolin Strap comes with a simple but ingenious method for length adjustment. However, sometimes the leather cord we use is a bit narrower or smoother than usual, and this can cause the cord to slip through the holes in the main strap. Here's how to fix it.
First pull one end of the cord out from its lacing hole.
Pass the loose cord underneath the other diagonal piece.
Loop it round and under the other piece again.
Finally poke the loose end back down the lacing hole that it came out of.
Give the strap a strong tug to make sure it's all good and tight with no slipping. You're ready to go!