If they're the ones I think they are, I haven't tried them because, after looking at them in a shop, I've found they weren't quite great looking quality-wise and that it would be cheaper to get rope from a hardware store (nylon can be just as soft as the silk, seeing as a silk rope isn't particularly soft the way you imagine a silk scarf) and knot it yourself, maybe leaving the knots tight and in after you get them right, if not having to tie them every time is what attracts you.