The arms on my specs are fairly uniform in cross section. When I use a traditional neck cord it tend to slip off the arms. If I use sports neck cord , the arms are attached to the cord using a neoprene sleeve with the cord ( with a boot lace end fitting ) pushed one end of the sleeve and the arm of the specs in the other, this again relies on friction and again tends to fail with the cord pulling out of the neoprene
Anyone know of a better solution ? The right sort of glue in the sleeve perhaps ?.
Chris