The Ducati Performance ones are made by Cover Car and are the absolute dogs danglies.I have the custom 999 one with the logo's on the side.
Kinda silky on the outside with a soft material inside.Its so good that when I sell the bike,I'm gonna keep it and turn it into a nightie for the missus!
The price of them is a bit steep tho,...well over £100,...I was lucky enough to get a secondhand one from a member.
www.covercar.it/html_ing/ing_coprimoto_class.htm If you are on a budget,the Oxford ones are pretty good.