Help! What is this piece of material that holds the pieces together?! Not the rivet but the lil fabric in between the rivet and the actual designed material. (Thanks for the help! :) )

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Help! What is this piece of material that holds the pieces together?! Not the rivet but the lil fabric in between the rivet and the actual designed material. (Thanks for the help! :) )

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Help! What is this piece of material that holds the pieces together?! Not the rivet but the lil fabric in between the rivet and the actual designed material. (Thanks for the help! :) )

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Description The item is gothic punk rivet epaulet. This special rivet pattern with tassel chain, elegant and full of charming. It is for men's

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