mifold Comfort Grab-and-Go Booster: Travel Booster for 40–100 lbs
The Comfort Booster is not FAA accepted. Rated for children who weigh 40–100 lbs, and measure 43.3-59 inches.
Flying with a car seat? Our Certified Child Passenger Safety Technicians are ready to help.
They'll walk you through every step — from choosing a seat that's safe for your child and convenient for your family, to getting it from the car, to the gate, and onboard the plane.
FAA Acceptance
Not approved
This restraint is not certified for use on aircraft. Use the Comfort for vehicle transportation only.
noChild Range
40–100 lbs and 43.5–59 in
The Comfort Booster covers children weighing 40–100 lbs and measuring between 43.5 and 59 inches tall. The minimum age is 4 years, though Velivolo CPST Experts recommend age 5 as a practical minimum for children transitioning from a harness seat to a belt-positioning booster.
yesBelt Type
Backless with padded foam seat
Requires vehicle lap-and-shoulder belt
yesFolded For Travel
Yes
Weighs ~1.75lbs and folds to 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches, fits in a personal item or carry on.
yesmifold Comfort Specifications
The mifold Comfort is an evolved version of the original mifold Grab-and-Go — same pocket-folding format with added foam padding and recline adjustment for children 40–100 lbs. It is not FAA accepted and cannot be used on aircraft; it is designed for rideshare, taxi, and rental-car use at the destination. At $75-$99 retail price and 1.75 lbs, the Comfort addresses the Original's biggest drawback — a bare, uncomfortable seat — while keeping the same ultra-compact travel footprint. We recommend it for families with older children who need a destination ground-transport booster.
- The Comfort Booster fits children 40–100 lbs and between 43.3-59 inches tall.
- The mifold Comfort is not FAA accepted for use on aircraft.
- Per mifold's specifications, the Comfort weighs approximately 1.75 lbs and folds to fit in a standard backpack.
- The Comfort adds foam padding and anti-slip surface.
mifold Comfort Specifications
Important — Car Seat Information
Child restraint information changes frequently. Airline policies, seat dimensions, and compatibility requirements are updated on an ongoing basis. For the most current and accurate information, please consult with one of our Certified Child Passenger Safety Technicians (CPSTs) inside the Velivolo app before you fly.
FAA Status — Not Approved for Aircraft
- Confidence:
- Not applicable (seat not FAA accepted)
- Regulatory:
- 14 CFR 121.311(b)(2)(ii) — belt-positioning boosters prohibited on US commercial aircraft
- FMVSS 213:
- Yes
- FMVSS 213a:
- yes
Airworthiness note
The mifold Comfort Booster is not approved for use on aircraft.
Aviation and Ground Transport Use
The mifold Comfort is not certified for use on aircraft. The Comfort is a destination ground-transport booster, designed for rideshare, taxi, and rental-car use after landing.
The mifold Comfort is a destination-only booster ideally for big kids — carry it on the plane as luggage and install it in the rental car, taxi, or rideshare on arrival.
- Install Method
- Not used on aircraft
- Economy Fit
- Does not fit standard economy
- Gate-Check
- Cabin-carry preferred
- Recline-Friendly
- No
How to Install the Mifold Comfort Booster
Complete Installation Walkthrough
Watch our full guide for installing the Mifold Comfort Booster
Velivolo Travel Score
Can not be used on aircraft, but small enough to fit in a personal item or carry-on bag without sacrificing room for other travel gear.
No gate-check needed — the Comfort travels inside your bag since it's small enough
Excellent for rideshare and rental cars — installs in seconds with any lap-and-shoulder belt
Among the lightest rigid boosters available; the foam padding adds slight bulk over the bare Original but remains highly packable. Folded dimensions are 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches
Velivolo Score
Not permitted for use on aircraft.
Vehicle lap-and-shoulder belt only
At $75 street price with a 40–100 lb and 43.3-59inches window, the Comfort offers multi-year use.
1.75 lbs, folds to approximately 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches — fits in a standard backpack for airport and rideshare use.
Pros and Cons
- Weighs approximately 1.75 lbs and folds to fit in a personal item or backpack.
- Foam padding addresses the original mifold's top complaint; the Comfort is significantly more comfortable for longer rides.
- At $75 street price, the Comfort is a budget friendly compact restraint.
- Covers children 40–100 lbs and up to 43.4-59inches
- No gate-checking required — fits in a standard carry-on or personal item and deploys in seconds at the rental car or rideshare.
- Not FAA accepted — cannot be used on the aircraft.
- No backrest means no head or lateral support during naps; not ideal as a primary daily booster and younger children.
- US retail availability is intermittent — many Amazon listings are third-party sellers; verify stock and delivery timing before travel.
Best For
Traveling families with older children
Families with older children (5+) who are developmentally mature enough to remain safely seated throughout the duration of the ride find this compact restraint more convenient than alternative boosters.
Rideshare and taxi families in cities
For families who take Uber, Lyft, or taxis regularly with school-age children, the Comfort provides FMVSS 213-certified belt positioning without the bulk of a full booster. It stays in a backpack until needed.
Original mifold owners seeking a comfort upgrade
Families already using the mifold Original who find it uncomfortable for their child will appreciate the Comfort's foam padding and recline adjustment — the same compact footprint with significantly better comfort for longer trips.
Grandparent and occasional carpool families
For grandparents or caregivers who need a booster for occasional trips without storing a full seat, the mifold Comfort is compact enough to keep in a closet or a car-door pocket until needed.
Key Features
Foam-Padded Seat Pan
The Comfort adds a foam-padded seat pan over the original mifold's bare aluminum-and-plastic rail design. The padding reduces pressure points during longer rides — the top parent complaint about the Original. The Comfort's seat pan is designed to stay in position during the ride while folding flat for storage. The seat also features anti-slip surface.
Pocket-Folding Compact Form Factor
The Comfort Booster folds to approximately 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches and weighs 1.75 lbs — a footprint small enough to fit in a standard backpack, personal item, or carry-on bag without a dedicated carrying case. The folding mechanism collapses the seat pan and arm wings into a compact pouch.
Adjustable Belt Guide System
The Comfort's shoulder-belt clip guide adjusts vertically to position the vehicle lap-and-shoulder belt correctly across the child's shoulder and chest. The guide positions the belt similarly to a traditional belt-positioning booster but in a more compact frame. Correct shoulder-belt position should be verified each time the booster is used in a new vehicle or new seating position to ensure the shoulder belt is appropriately placed across the child.
Real-World Scenarios
Disney Cruise with a 7-year-old who needs a booster once from airport to cruise ship
Pack the Comfort in a backpack, carry it on the plane, and install it in the rideshare car on arrival. At 1.75 lbs folded, it adds negligible carry-on weight. This is exactly the scenario the mifold Comfort is designed for. Use it from airport to cruise and keep it stored in your suitcase for remainder of trip.
Grandparent backup booster for weekend visits
The Comfort folds small enough to store in a glove box, door pocket, or closet between visits. For an older child 40–100 lbs visiting grandparents periodically, the Comfort provides FMVSS 213-certified belt positioning without the grandparent storing a full-size booster permanently.
Three-across in a minivan for a family road trip
At approximately 10.2 inches wide, the Comfort can enable three-across configurations in wider second-row minivan benches.
How It Compares
Per BubbleBum's published documentation, the Inflatable Booster deflates to approximately 12 × 6 inches and weighs under 1 lb — slightly larger but lighter than the mifold Comfort at 1.75 lbs. Both cover 40–100 lbs with a lap-and-shoulder belt.
Read full reviewPer Hiccapop's published documentation, the UberBooster is an inflatable-and-rigid-rail booster for children 40–120 lbs. Like the mifold Comfort, it targets rideshare and travel families. The UberBooster inflates to provide a padded surface and deflates smaller for storage; the mifold Comfort uses fixed foam padding without an inflation step. The Comfort is easier to deploy with no inflation wait; the UberBooster has a higher 120 lb weight ceiling.
Read full reviewPer Hifold's published documentation, the Fit-and-Fold is a highback booster covering 40–100 lbs with a full backrest and shoulder-guide system. It folds to travel size but weighs approximately 8 lbs versus the Comfort's 1.75 lbs. The Comfort is significantly lighter and cheaper; the Hifold offers head support and lateral protection the Comfort lacks.
Read full reviewAirport and Ground Transport Tips
Pack in Personal Item
The mifold Comfort folds down so you can pack it in a backpack or personal item alongside travel gear. There is no need to gate-check or check as baggage — carry it on board and deploy at the destination vehicle.
Verify Belt Fit Each Vehicle
Shoulder-belt position should be verified each time the Comfort is used in a new vehicle or seating position. Adjust the shoulder-belt clip guide before every new installation.
Frequently Asked Questions
Is the mifold Comfort FAA accepted for use on aircraft?
The mifold Comfort Booster is not FAA accepted and cannot be used on any US commercial aircraft during any phase of flight.
What's the difference between the mifold Original and the mifold Comfort?
Per mifold's published product documentation, the Comfort Booster adds two key upgrades over the original mifold Grab-and-Go: a foam-padded seat pan and a anti-slip bottom. The Comfort's foam padding addresses this directly, making longer rides significantly more comfortable. Both models share the same 100 lb and 59-inch limits, the same compact folding form factor, and the same not-FAA accepted status. The Comfort costs more versus $39–49 for the Original. For families planning rides longer rides where child comfort is a priority, the Comfort is the recommended choice.
What are the weight and height limits on the mifold Comfort?
The Comfort Booster covers children weighing 40–100 lbs and measuring between 43.5 and 59 inches tall. The minimum age is 4 years, though Velivolo CPST Experts recommend age 5 as a practical minimum for children transitioning from a harness seat to a belt-positioning booster. .
Is the mifold Comfort still pocket-foldable like the Original?
The Comfort Booster folds to approximately 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches. The Comfort weighs approximately 1.75 lbs in its folded configuration. Both dimensions are compact enough to fit in a standard backpack, personal item, or carry-on bag without a dedicated packing case. The foam padding does not require deflation or special preparation before folding, unlike inflatable alternatives such as the BubbleBum.
How long is the mifold Comfort good for before it expires?
The Comfort Booster has a 10-year expiration from the date of manufacture. The date of manufacture is located on a label on the underside of the seat.
Can I use the mifold Comfort in an Uber or rideshare?
The Comfort Booster is FMVSS 213 certified for use in any vehicle with a lap-and-shoulder belt, including Uber, Lyft, taxis, and other rideshare services. To use the Comfort in a rideshare, confirm the rear seating position has a 3-point belt, fold the Comfort out, route the lap belt through the lower channel, and adjust the shoulder-belt clip guide for the child.
Is the mifold Comfort worth the $30 upgrade over the Original?
The mifold Original's top limitation is comfort — the bare aluminum rail is noted as uncomfortable for children during rides longer than 20–30 minutes. The Comfort directly addresses this with a foam-padded seat pan and recline adjustment, making it significantly more suitable for longer airport-to-hotel or city-to-city rental-car trips. At approximately $30 more street price, the Comfort is the recommended choice for any family planning rides longer than a short hop. For families who already own the Original and find it adequate for very short trips, the upgrade may not be necessary, but for new buyers the Comfort offers better value for most travel scenarios.
mifold Comfort vs BubbleBum — which is better for travel?
Both are compact travel boosters for children 40–100 lbs but with different approaches. The BubbleBum is inflatable, deflating to approximately 12 x 6 inches and under 1 lb — larger but slightly lighter than the Comfort at 1.75 lbs and 9.4 in (W) × 4.7 in (D) × 2.0 in (H) inches folded. The Comfort uses fixed foam padding that does not require inflation. Choose the BubbleBum if absolute packing size and weight are the priority; choose the Comfort if a rigid padded seat and no inflation step matter more for your travel style.
Sources
- 1mifold Comfort Booster Product Page (2026) — Specifications, weight limits, color variants, product description. Source
- 2FAA 14 CFR 121.311 — Use of Safety Belts (2024) — Regulatory basis for booster prohibition on US commercial aircraft. Source
- 3NHTSA Vehicle Safety — Car Seats and Booster Seats (2026) — Recall database and NHTSA ease-of-use rating status for mifold Comfort. Source
Last updated: 2026-05-15
Velivolo Editorial Team
Family Travel Experts
Our editorial team combines certified child passenger safety technicians, frequent-flying parents, and automotive safety researchers to deliver independent, data-driven car seat reviews for traveling families.
.webp&w=3840&q=75&dpl=dpl_45uUh9G5C7kJ77y59qU1D6TW4Ksi)
Legal Disclaimer
The car seat information provided on this page is intended for general informational purposes only and is subject to change without notice. Velivolo makes no representations or warranties, express or implied, regarding the accuracy, completeness, or timeliness of any car seat data, airline compatibility information, or related recommendations displayed on this platform.
Velivolo is not liable for any damages, injury, loss, or harm arising from reliance on incorrect, outdated, or incomplete car seat information or recommendations. Parents and caregivers are solely responsible for verifying all child restraint information with the relevant airline, the car seat manufacturer, and a Certified Child Passenger Safety Technician (CPST) before travel.
Affiliate Disclosure: Some product links on this page may be affiliate links. Velivolo may receive a commission if you make a purchase through one of these links, at no additional cost to you. This does not influence our content, recommendations, or editorial decisions.
Use of this information does not constitute professional child passenger safety advice. For personalized guidance, consult a Certified Child Passenger Safety Technician (CPST) through the Velivolo app.
Ready for the Most Portable Booster for Destination Travel?
Velivolo helps families pick the right car seat for every trip — from FAA accepted aircraft seats to ultra-compact destination boosters — so you can travel safely without the checked-baggage fees.