MarkWW

What does everybody use to hold all their cogs/chainrings/tools/etc.?

The only track bag that I've been able to find is the EAI one. Does any other company make one?

CafeRacer

The EAI one is based off an old school suntour one that you still see a few of a big race. Last big race I went too every other person had an EAI bag. Very handy for keeping your rings and sprokets orginized. I find it doesnt have as much tool space as needed but carrys the essentials no problem. (whip, couple wrenches, chaintool, alan keys, cone wrenches) The feature I like is you can use some toe straps to hook it up to a fence-rail in the pits or off a EZ up tent. At the end of the day you just zip it up and go home with all your stuff still orginzed and not floating around in your kit bag.

I am The Edge

is there a link to purchase or see one of these bags?

peterm5365

https://www.businesscycles.com/trcomp2.htm

You can buy it there. They are way overpriced in my opinion, but what isn't.

bitingduck

Yeah, I was too cheap to buy one so I had to wait until I won one in a race. I do really like it though. Minor quibbles:
I'd rather have more space for chainrings and less for cogs
It's a hair too short for my lockring wrench (I don't use lockrings, but I carry the wrench in case I encounter one)
I'd kind of like one more pocket for a spare chain.