Knitted cord approx 4mm diameter. Polyester outer with string centre. Very strong.
Sold by the metre.
Exactly what I was looking for, my 7 yo son is very tall and for some reason some joggers don’t have a working drawstring, this is going to really help when needed to buy larger sizes for the leg length and tighten the waist as he’s quite slim. I’ll definitely order again. Very quick delivery too.