I think these trousers are cool in all senses of the word. They open out quite flat then tie in two pieces around the waist. When I walk they come apart a little, and would become more daring if I put on weight, I expect (less overlap).
I bought them on holiday in Portugal four years ago and I love their um...'subtlety of colour' and I think the addition of a few sequins adds an essential little extra zing.
My sons forbid me to go out in them, however, so I am displaying them on my blog. No one will ever see them there.