Snatched FlamesVelvet Du-Rag-Premium Quality-Wave Cap Long Straps

For the black one is the stitching on the outside of the durag as the velvet?

Is it safe to wash this product?

My red velvet durag bled through my white shirts is it possible to wash the shirts to get them out or are they permanent stains?

Are these machine washable? if not how do you clean them?