On the positive side, the fabric seems to be of good quality and they're well put together. I can believe they'd offer reasonable protection in a slide.
However, they are such a skinny cut as to be almost unwearable. The waist size is generous but the upper thigh and calf are so tight that you can't fully pull them up and they then try to pull themselves down. Maybe I'm just not trendy enough to wear my jeans at half mast the way some do, but they're completely impractical to wear on a bike, where you want your waistband to stay up inside your jacket, and to be able to lift your leg over the seat. A complete waste of effort and money.