Nice job, thanks for posting.
I have one made out of canvas (store bought, so not as nice) that I've used for the past 15 or so years. I don't know how many times I've been picked on for carrying a "purse" over the years, but the laughter always stops when I pull a sandwich, a pair of dry gloves, or whatever out of it. Then the chop busting turns to envy.
I use silicone spray on mine once in a while. It doesn't keep things dry in a heavy rain, but lighter stuff beads up and rolls off. I keep the things that I want to stay dry in ziplock bags inside. Thanks again.
Bob