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Axkid Up

The Axkid Up is 17.1 in wide, weighs 20.9 lb, and has a booster weight limit of 120 lb, per Axkid. High back booster listed on the maker's US site with a raisable seat, installing with rigid LATCH or the vehicle belt.

  • 120 lbBooster to
  • 20.94 lbSeat weight
  • 17.12 inWidth
See it on Axkid's site

All booster seats

Up: key facts

  • The Axkid Up works as a booster from 40 to 120 lb and 43.3 to 60 in tall, per Axkid.
  • It installs with Rigid-LATCH or vehicle belt.
  • It's 17.1 in wide at the widest point and weighs 20.9 lb.

From Axkid's published specs. Always follow the limits on your seat's labels.

How the Up stacks up

Against the 65 booster seats we track. The shaded band is where the middle half of them fall; the dot is this one.

Booster weight limit120 lbHighest booster limit of 64 booster seats

Within the typical range for booster seats (100 lb to 120 lb).

This one
100 lbmiddle 110 lb120 lb
Width17.1 in15th narrowest of 31

Within the typical range for booster seats (17 in to 18.6 in).

This one
10.2 inmiddle 17.3 in23.2 in
Weight20.9 lb42nd lightest of 42

Above the typical range for booster seats (6 lb to 13.2 lb).

This one
1.8 lbmiddle 9.8 lb20.9 lb

What sets the Up apart

Measured against the 65 booster seats we compare, from each maker's published specs.

  • Load leg1 of the 65 booster seats with this listed have it
  • Highest seat weightof the 42 booster seats that list it: 20.94 lb
  • Width: 17.1 inin the middle half of the 31 booster seats that publish it (17 in to 18.6 in)
  • Weight: 20.9 lbabove the middle half of the 42 booster seats that publish it (6 lb to 13.2 lb)

Next to its closest matches

  • Harmony Youth BoosterNext to it, the Up is 10 lb higher booster limit; has load leg (the Youth Booster doesn't).
  • Diono Cambria 2XTNext to it, the Up is 3 in narrower; 7.7 lb heavier; has load leg (the Cambria 2XT doesn't).
  • Diono SolanaNext to it, the Up is 0.2 in wider; 11.7 lb heavier; has load leg (the Solana doesn't).

Flying with the Up

American lists “Booster seats with no approval label or shoulder harness” under seats and devices not approved for use on board (source).

What airlines say about car seats:

  • American: “Each ticketed customer is allowed 1 stroller and 1 car seat to be checked free of charge” “If an unoccupied, adjoining seat is not available, the gate agent will check the safety seat to your final destination.” Source
  • Alaska: “We will transport your child's car seat and stroller free of charge as checked baggage.” Source
  • JetBlue: “Checking a child safety seat will not count towards your checked baggage allowance and there is no fee assessed” Source
  • Spirit: “One (1) car seat will be accepted per child as checked baggage at no charge.” Source
  • Frontier: “strollers and car seats can be checked for free.” Source
  • Allegiant: “There is no charge for checking or gate checking one car seat per fare-paying passenger.” Source
  • Breeze: “Child seats may be carried on board the aircraft if a seat has been purchased for the Infant or Child” Source

Quoted from each airline's page as of 2026-11-02.

Listed features

  • Maker lists 40-120 lbs and 43.3-60 in.
  • Maker lists rigid LATCH or vehicle belt attachment
  • Maker lists dimensions in inches and pounds

Where to buy the Up

Prices and availability change. We may earn a commission from some links.

good to know
  • Check for recalls: Search the agency's recall list with the model number and date code from the label: NHTSA recall search.
  • Car seat use and installation: see NHTSA's car seat page, which also lists free car seat inspection by certified technicians. Check the label and the maker's instructions, and ask your pediatrician about your child.

Full specs

Axkid Up
TypeBooster
Booster weight40–120 lb
Booster height43.3–60 in
Seat weight20.94 lb
Width17.12 in
InstallationRigid-LATCH or vehicle belt
Load legYes
Anti-rebound barNo
RotatesNo

Compare the Up with

How each closest rival differs from the Up, from the makers' specs.

Ask the meadow

Up: questions answered

From Axkid's published specs, last checked 2026-11-06.

Will the Axkid Up fit three across or in a small car?

It's narrower than 56% of the boosters we track, at 17.1 in. The narrowest is the Mifold Comfort Grab-and-Go Booster at 10.2 in. Fit depends on your vehicle; check each seat's manual and your vehicle manual. Car seat use and installation: see NHTSA's car seat page, which also lists free car seat inspection by certified technicians. Check the label and the maker's instructions, and ask your pediatrician about your child.

Up or Youth Booster: what's different?

By the makers' specs, the Up has a load leg. See every spec side by side.

Is it OK to buy a used Up?

NHTSA publishes guidance on used car seats on its car seat page. Check the label and the maker's instructions, and ask your pediatrician about your child.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.

More booster seats

Where these specs come from

Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.