Review on StarTech.com THINTOS10: 10 ft. Ultra-Thin Digital Optical Audio Cable - Male/Male - Toslink SPDIF (3m) by Jamar Gow

Right off the bat, all the isolation tricks you see on other products just right. The fiber is only affected by light and a thin opaque screen is sufficient. The only problem is that it still breaks with less force and wears out faster over time. Those two factors are irrelevant as I don't use cable as skipping rope and the environment won't affect the insulation for decades to come. This is not a problem as they are cheap and work like any fiber optic cable. They are also easier to train with a thinner cable. Maybe they're so cheap they don't work, but I've bought a few of these and they all work well.