As for Skywise's wristband thingies, I saw in "The Heart's Way", in the scene where the maidens were undressing him, one of them lying on the unclasped and sort of folded in half. So I think they have a hinge on one side, and a clasp on the other. But wouldn't wearing all that metal stuff get hot in the desert?
Another question: How do they clip their toenails? It'd be a little hard to do with a knife!