I got a lightly used bike the other day and it's the first I've owned with internal storage.

I would put a tpu tube, levers, multi tool, plug kit, spare link, and my small hand pump, since I've kinda gotten away from CO2 on the MTB.

The bike came with a bontrager roll type bag. The trouble is that it's open ended and I'd really like a closed bag, since things can and will rattle out.

I would think that something like a Crown Royal bag would get the job done but it doesn't have thick enough material to prevent rattling. I'd be interested in something about that size and shape that's either made of thick polar fleece or quilted material like a thin nano puff jacket.

Does this exist? I'm probably capable of sewing it but with no sewing machine and limited time, I'd rather not.

My basic search online didn't really turn up anything I was interested in.