I always make them to with the bottom open, it's much easier to get the arrows out.

I think it was on this site that I heard about using a condom for each arrow. Works  great on arrows with screw in points. Cut a small slit in the tip, slid over the shaft and replace the tip. Simply pull the condom off towards the nock when needed. The good part of this is that unlike the other covers this protects the fletching from water dripping down the shaft.

Now it was pretty interesting explaining this to my wife right before I left on my 3 week trip to Alaska.
et

I have a old pair of neopreme camo wader.I think a piece of the leg could be just what i want.The feet are worn badly so this will be a great use  for the wader.
So do you think i should wire it to the quiver or just run a bungee cord.
Thanks for the help.
Dave

downside: Briars and brush pull them off at the worst possible time, and it's hard to put an arrow back once it's drawn. That said, I use them on my side quiver for big game. I really like my Catts sidekick--you don't need fletch cover with it.

heres a pic of my homemade fletch cover...sleeve of an old trebark shirt.

A topic I can relate to, I just completed my custom build as well.  Used an old trebark shirt like hick did.  Cut off the sleeve above the wrist and just above the elbow.  Turned it inside out, turned a gallon zip loc bag inside out, and stitched it along the bottom.  Pushed the bag inside "right", stitched the top corners, ran a shock cord from an old coat into each corner.  I put two of the "push in" locker button dealy thing on the cord.  The top one is how I wrap the loop around my quiver bottom, the bottom one slides down to tighten around my arrows if needed.  The key for me was to make the cord the right length.  It pulls snug when attached- but I can still push an arrow down into it- and get the broadhead out of the quiver- then pull the shaft out of the bag.  Sorry- no pics, I'm at work. It works pretty slick, and is quiet.  I'll try to post a pic tonight after b-ball practice....