I am currently using a Samsung S Galaxy II GT-i9100. The bag is black velvet on the outside and a kind of cream pearl velvet interior. The phone fits snugly inside (the first use you have to "break in" the rope at the top to open and close with ease), and an additional benefit is that every time you pull the screen clean of stains and fingerprints. Although the material is fabric, the ringer and vibration is not deaf / mitigated, so do not worry about that part.
My phone is tough and really is not that bad, but I like the added protection the bag is because I keep in my jeans pocket with coins, keys, pens and other things and not add to bulk. Furthermore, it is all black with discreet logo on the side, hardly noticeable and you do not have to worry about attracting attention.
I have a couple of comments, and Dealbreakers small, but there, however. One is inherent in the Velvet: Sometimes when I pull the bag out of my pocket all the content, so I learned to wrap my hand around it before removing. The second is that the velvet to be, some do not see it as very manly, but that really depends on what's hot in the world.
Overall I am very happy with the bag, and I prefer this to have a case to increase the volume or a screen saver that can mess with the performance of the touch screen.