close one...

Been sitting on this idea for months. Somehow wanted to line/cover the bottom of a canvas bag so it is more rugged/waterproof. Wanted to use some kind of truckbed/rhinoliner/herculiner or similar. Truth is it works for impact resistance on flat surfaces but cracks when flexed. See my test material below. Not suitable for this application. [so you're posting about stuff you haven't done now?? -ed.] At the last minute I held off... Not even going the waxed cotton route. Keeping as is. Close one...

dis-union suit

Somewhere somehow I bet you picked up or where given a union suit. May have been a real or imagined need, or a present. Damn me if they are not uncomfortable though (wedgie) and impractical (sweaty cold cotton/poopshoot). A thermal undershirt though -that might get some use. Dis-join the suit below the rear button (you know, for a feature...) in an arc. Still long enough to tuck in, and then some.

Like staring down the barrel of a gun...
the backflap button and reinforcing tab.
Interior contrsuction of that area -double layer flap.

Stitch it down.
Final back. 'Shoot button left at bottom.
Just throw a red flannel on top and you are ready for the spring drive.
Or could sew the placket up the front and make it more like this.