Of course, some extreme preppers will settle for nothing less than a military-grade gas mask rated for chemical, biological, and nuclear warfare. While it is true that such masks offer much better protection against nerve agents and similar extremely harmful substances, it's not a likely concern in most parts of the world - and either way, it's doubtful that you would have enough time to suit up once the symptoms kick in.
With that goal in mind, let me say this:  this is not a list of items intended for deep storage. Nor is it a list of items packaged so that they have a 25 year shelf life.  (And in reality, do you really need your stored food to last that long?)  I am also not going to list items that might be foreign to your palate, difficult to find, or too costly to absorb into your weekly shopping budget.
I can't claim to have good advice for people who are already in a tough spot: if your household earnings are well below median, you may simply have no disposable income to build a personal safety net. But for most other folks, the ability to prepare for the zero-income contingency is well within reach - and it would be unwise not to give it a go. Sure, even a lifetime of belt-tightening won't make the average middle-class family fabulously rich. But rainy-day funds work in a different way: their purpose is to get you through a rough spell, not to pay for a mansion or a fancy car. Since the amount needed is directly proportional to how much you currently make, it makes relatively little difference if your household brings in $70k or $140k a year. Either way, if you set aside 10% of every post-tax paycheck, you should have a 6-month financial safety net established within 3 years and a change.
TREE SACKS ARE LIGHT WEIGHT, EASILY PACKED, AND PROVIDE COMFORT WHEREVER YOU ARE! The Tree Sack is just 15.75 oz. with lots of room for a single at 9ft long by 4½ ft wide. The Tree Sack Double is just 25 oz. and has all the space you need being 10ft long by 6½ ft wide. The Tree Sack holding bag allows you to stuff the entire hammock, straps, and carabiner into one small unit. This makes carrying or packing the Tree Sack in your backpack a breeze!