These Necklace Cords are smooth and feel like real leather. They are made of a waxed cotton but I never would have guessed because of the feel and texture. These are great for charms because they will slide easily. This came in a pack of 50 pieces, 25 brown and 25 black. The cord is 2mm thick and 18 inches long. It has an adjustable 2" chain so they can be adjusted bigger or smaller. It also had a nice chrome plated lobster claw latch and chain. This type of latch is much sturdier and stays closed.
I bought these to make charm necklaces and they are exactly what I was looking for. The cord is strong and sturdy. The o-ring slides easily on the cord. These worked great for this type of necklace. I will definitely buy these again.