ParkTool Emergency Tire Boot
A punctured inner tube is no big deal, so long as one carries a patch kit.
But what if a rock tears a gash in the tire? And you’re miles from home? Then you might have a “problem”. Especially if the puddles are freezing now, and you just crashed and certain areas are leaking red stuff.
Stash an emergency tire boot @AMAZON patch in your saddlebag, and there is a fighting chance that the tire can be patched well enough to get home with decent tire pressure. The patches take very little space, and add very little weight.