The cord is made from waxed nylon. It is 1.8mm thick.
The cord will extend to approximately 34mm at its longest and tighten to approximately 17mm at its tightest.
The cord is adjustable by pinching the special knots between your thumb and finger and pulling.
It is extremely strong and is made to be worn all the time - even in any kind of water.
It will not be affected by soaps, shampoos, chorines in pools, body lotions, make-up, aftershaves, the salt water, sunblock etc...
The wax coating prevents the cord from getting soaked and the nylon prevents it from rotting.