They work great. Don't worry about brands, just make one yourself. I have expiremented quite a bit with these and I have found a design that makes absolutely zero noise while shooting. Make the cover about 10" long, and make it so that it is not very loose. Make it where it touches most of the feathers but it does not make them lay down. If you do this with regular fabric then it WILL make noise. So that is why I use this stuff I got from walmart that is fleece on the inside, and it looks and feels like cotton fabric on the outside. I would tell dimensions but you need to custom cut it for your own quiver, so it fits correctly. I also do as Terry suggested and keep an arrow outside of the cover for quick removal. If you look at the one Terry posted then you will see why I like to custom cut it to fit each specific quiver, his looks kinda baggy because in my opinion, it is a little too big. No, offense Terry, not saying that there is anything wrong with it, just stating my opinion. I will post a pic of mine shortly. hope this helps at least a little.