For anyone thinking about getting a pair of black velvet leggings this year, here is my two cents on the Lysse velvet leggings, which I'm wearing right now.
First, they are in the dreaded "no longer available" category at Nordstrom, but are available at Zappos http://www.zappos.com/lysse-ma.....ings-black . Nordstrom sizing started at S, (not XS) and my guess would be that is because they run a little small. I normally would take an XS and right now am at a much lower weight than usual and the XS is still pretty snug on me. I would say size up one size unless you're after a super tight fit.
The fabric has a sheen to it, almost twinkly in sunlight, the way synthetics are. If you're after the deep dull black of a heavy cotton or silk velvet, you may not enjoy this.
The snugness of the wide Lysse waistband has a girdling effect that you may find useful under sweaters and tunics.
Overall, I am pleased with these and would purchase again. They did not drive me crazy by picking up every thread and bit of lint. I lint-rolled once during the day, which I would have done with any pair of black bottoms. (I don't have pets at the moment -- if you do, might want to consider that in your decision-making.)