Pack a full trip in one bag
OneBag Kit is a practical guide brand for carry-on and one-bag travel. We publish clear, citable answers on packing cubes, backpack styles, and trip lists — so you can leave the second bag at home.
Airline cabin limits vary by carrier and fare. Treat dimensions and weight here as typical ranges, then confirm with your airline before you fly.
Start here
Three friendly entry points — the pillar system, a printable checklist, and the “is my bag big enough?” answer.
Packing systems
Cubes, folders, bag openings, laundry, and fabric choices that make one bag work.
How many packing cubes for 40L?
A realistic cube count and size mix for a ~40-liter travel backpack.
Compression vs regular cubes
When zip compression helps — and when a regular cube is the better choice.
Packing cubes vs folders
Flexible zip cubes or flat, low-wrinkle garment folders — and when to combine them.
Clamshell vs top-loader
Which backpack opening style suits hotels, hostels, and airport security.
Laundry on a one-bag trip
Sink washing, wash-and-fold, and where dirty clothes go in the bag.
Is merino worth it?
Odor resistance vs price, durability, and drying — an honest take.
Trip lists
Sample carry-on lists for climate and length — adjust to your season and airline.
Rules & limits
Underseat vs overhead, strict weight caps, and what security treats as a liquid.
Personal item vs carry-on
What goes under the seat, what goes overhead, and how to survive a gate check.
Personal item only
Fit a short trip under the seat: bag size, capsule, and what to cut.
Under a 7 kg limit
Light bag, weigh at home, cut dense items, wear the heavy stuff.
What counts as a liquid?
Gels, pastes, spreads and sprays — plus how to pack carry-on toiletries.
Checklist
Print or download the free tick-box list, then read the About note before you fly.
Frequently asked questions
What is OneBag Kit?
OneBag Kit is a free informational site with original answer pages on carry-on and one-bag packing — packing cubes, backpack styles, and trip lists. There is no checkout on this site.
Is OneBag Kit a paid product?
No. The site publishes free guides and a free printable checklist (HTML and PDF at onebagkit.com/checklist/). A paid kit may or may not ship in the future, but nothing is for sale here now.
How do I join the waitlist or contact you?
Use the contact form on the homepage or email hello@onebagkit.com. Soft waitlist only — no purchase required.
Do your packing tips guarantee airline acceptance?
No. Cabin size and weight rules vary by carrier, aircraft, and fare. Treat ranges on this site as typical guidance and always confirm with your airline before you fly.
What the kit is
Today OneBag Kit is a set of free answer pages focused on carry-on packing, plus a free printable checklist (HTML and PDF). See About and the soft waitlist below. There is no checkout on this site.