Reddit mentions of Granite Gear AirBags Stuff Sack - 11L

Remember the underlying philosophy of a bug out bag - you have ~3 days to get from A to B, you're not setting out to survive long term in the wilderness.

Try not to use bags heavier than ~500D Cordura if you go the nylon route. That stuff is super strong already, and unless you're sliding down granite on your pack, it should last a while. These bags are usually way overbuilt, and too robust for the regular user.

Try to stay away from too many organizational 'modules' on the inside. I've seen dudes overdo it to the point where a 1/4 of the base weight is in the fabric of various molle attachment pouches.

If you choose to use 'modules' do it sort of like this guy by trying to use the fewest and lightest shells inside as possible. I'll admit, he's pretty elaborate.

Check out cuben fiber/dyneema gear - packs and tents. Replace what you can with ziploc bags, or silnylon stuff sacks

Definitely bring:

-One each: fixed blade knife, small prybar, silcock key, AAA flashlight+batteries, powerpack, cellphone, compass, water filter, firesteel, canteen mess kit, tent, sleeping bag, sleeping pad, crankable emergency am/fm radio, small first aid kit, gps tracker or a map of the area.
-Food and water for 3 days.
-1 change of clothes in dry bag
-self-defense element, location dependent
-rainshells, also determined by location

I don't think you need much more. This is my 2 cents off the top of my head, and by no means a complete, comprehensive list.

E: spelling