Clek Olli
The Clek Olli is 18 in wide, weighs 5 lb, and has a booster weight limit of 120 lb, per Clek. A lightweight backless booster with rigid-LATCH connectors and a quick-release strap.
- $149.99List price
- 120 lbBooster to
- 5 lbSeat weight
- 18 inWidth
Olli: key facts
- The Clek Olli works as a booster from 40 to 120 lb and 40 to 57 in tall, per Clek.
- It installs with Rigid LATCH or seat belt.
- Clek says it expires 9 years after the date of manufacture.
- It's 18 in wide at the widest point and weighs 5 lb.
From Clek's manual and published specs. Always follow the limits on your seat's labels.
How the Olli 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.
Within the typical range for booster seats (100 lb to 120 lb).
Within the typical range for booster seats (8 years to 10 years).
Within the typical range for booster seats (17 in to 18.6 in).
Below the typical range for booster seats (6 lb to 13.2 lb).
Within the typical range for booster seats ($55.99 to $159.99).
What sets the Olli apart
Measured against the 65 booster seats we compare, from each maker's published specs.
- 5th lightestof the 42 booster seats with it published: 5 lb
- Width: 18 inin the middle half of the 31 booster seats that publish it (17 in to 18.6 in)
Next to its closest matches
- Chicco KidFit Adapt Plus 2-in-1Next to it, the Olli is 10 lb higher booster limit; 1 in wider; 5 lb lighter.
- Chicco KidFit Zip Plus 2-in-1Next to it, the Olli is 10 lb higher booster limit; 1 in wider; 5 lb lighter.
- Britax Skyline 2-Stage Belt-Positioning BoosterNext to it, the Olli is 1 years shorter before it expires; $10 more.
Flying with the Olli
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
- Only 5 lb
- Rigid LATCH installs in seconds
- Detachable cup holder
- Lifetime extended warranty
Worth checking
- Backless only (no head or side support)
- Needs vehicle head support
Where to buy the Olli
Prices and availability change. We may earn a commission from some links.
- 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
| Clek Olli | |
|---|---|
| Type | Booster |
| List price | $149.99 |
| Booster weight | 40–120 lb |
| Booster height | 40–57 in |
| Seat weight | 5 lb |
| Width | 18 in |
| Installation | Rigid LATCH, seat belt |
| Load leg | No |
| Anti-rebound bar | No |
| Rotates | No |
| No added flame retardants | Yes |
| Expires after | 9 years |
Compare the Olli with
How each closest rival differs from the Olli, from the makers' specs.
- ChiccoKidFit Adapt Plus 2-in-117 in wide10 lb$149.99
- 10 lb lower booster limit
- 1 in narrower
- 5 lb heavier
- ChiccoKidFit Zip Plus 2-in-117 in wide10 lb$159.99
- 10 lb lower booster limit
- 1 in narrower
- 5 lb heavier
- BritaxSkyline 2-Stage Belt-Positioning Booster$139booster to 120 lb$139.99
- 1 years longer before it expires
- $10 less
- Peg PeregoViaggio Shuttle 1206 lb$129$129.99
- 3 years longer before it expires
- 1 lb heavier
- $20 less
Olli: questions answered
From Clek's published specs, last checked 2026-11-06.
Will the Clek Olli fit three across or in a small car?
It's wider than 66% of the boosters we track, at 18 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.
Olli or KidFit Adapt Plus 2-in-1: what's different?
By the makers' specs, the Olli has no added flame retardants (maker's claim). See every spec side by side.
Is it OK to buy a used Olli?
NHTSA publishes guidance on used car seats on its car seat page. Clek lists a lifespan of 9 years from manufacture for this model. 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
- DionoEverett NXT18.5 in wide11.1 lb$129.99
- ClekOzzi18 in wide5 lb$129.99
- Joiecilantro fx 2-in-1 Belt-Positioning Booster7 lb$119$119.99
- ChiccoKidFit Zip Air Plus 2-in-117 in wide11 lb$186.99
- DionoConnect3 R 2-in-1 High-Back Booster16.3 in wide10.8 lb$109.99
- ChiccoKidFit ClearTex Plus17 in wide10 lb$109.99
Where these specs come from
- clekinc.com/products/olli
- clekinc.com/collections/booster-seats
- support.clekinc.com/hc/en-us/articles/360045719572-Download-Owner…
Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.