I wanted a way to stop my binos from moving about, especially if I crouch or crawl, but didn't fancy having a bino harness strapped to my chest, as I feel I already have enough paraphernalia. So I sewed a couple of magnets covered with a thin leather patch onto my stalking jacket where the ends of the binos naturally rest when I've got them round my neck. And then strapped a few more onto each end near the objective lens with some self-amalgamating tape. Works very well so far, they're held just firmly enough to the jacket, and 'snap back' into place very quietly.
