Germanshepherdsmum
I see it’s velvet. Perhaps washing would ruin the pile?
I would say if is cotton velvet, it would ruin the pile. However, it is 100% polyesrer.
I have some cushions in a similar 100% polyester velvet. The pile is quite low so I think they would wash OK and the nap wouldn't be affected.
For the jacket, I would consider hand washing.
I have had quite a few items of clothing that say dry clean only. I have washed them by hand and spun them in the washing machine. I think they do it to cover themselves.
Would they send you a sample that you could try washing - just realised someone has already suggested this 
Also, if it was a jacket, how often would you need to wash it anyway?