WellieSTR 200 Pieces Sewing Elastic Band Cord with Adjustable Buckle Stretchy Earloop Lanyard Earmuff Rope DIY Sewing Supplies-Black-

1.Color: Black ;QTY: 200PCS ; Material: 85% polyester, 15% rubber  ; Length: 10cm(4 inch) ; 2.This cord have good resilience allow them to restore the original length without deformation. 3.Effectively reduce the pain and pressure of wearing a mask in the ear for a long time.Wear it in the most comfortable state. 4.Easily slide over the earlcord with a soft adjustable buckel which holds the mask securely to the wearer. 5.Elastic buckle band used for earmuff, earflap, and respirator mouth-muffle mask or other craft project supplies.