Safety 1st TriMate
The Safety 1st TriMate rear-faces up to 40 lb, forward-faces up to 65 lb, and has an expiration of 10 years, per Safety 1st. Safety 1st all-in-one with rear-facing, forward-facing and belt-positioning booster modes, an 8-position headrest and harness and a 3-position base.
- $149.99List price
- 40 lbRear-facing to
- 65 lbHarness to
- 100 lbBooster to
TriMate: key facts
- The Safety 1st TriMate rear-faces from 5 to 40 lb and 19 to 40 in tall; forward-faces with a harness from 30 to 65 lb and 34.4 to 49 in tall; works as a booster from 40 to 100 lb and 43.4 to 52 in tall, per Safety 1st.
- Outgrown by height: "Rear-facing: the top of your child's head MUST be at least 1 in. (2.5 cm) below the top of the car seat's headrest. Forward-facing: the top of your child's ears MUST be below the top of the car seat's headrest. Booster: the top of your child's ears should never be above the top of the booster seat's headrest."
- It installs with visible belt paths.
- Safety 1st says it expires 10 years after the date of manufacture.
- Safety 1st lists it as certified for aircraft ("This restraint is certified for aircraft use when used with the internal harness. / Booster Seat: This restraint is not certified for aircraft use, when used as a booster seat, because aircraft seats do not have shoulder belts.").
From Safety 1st's manual and published specs. Always follow the limits on your seat's labels.
How the TriMate stacks up
Against the 57 all-in-one car seats we track. The shaded band is where the middle half of them fall; the dot is this one.
The same as most all-in-one car seats (10 years).
The same as most all-in-one car seats (40 lb).
Below the typical range for all-in-one car seats ($229.99 to $399.99).
What sets the TriMate apart
Measured against the 57 all-in-one car seats we compare, from each maker's published specs.
Next to its closest matches
- Baby Trend Journey 4-in-1Next to it, the TriMate is 1 years longer before it expires.
- Safety 1st Grow and GoNext to it, the TriMate is $10 less.
Flying with the TriMate
Safety 1st's label: “This restraint is certified for aircraft use when used with the internal harness. / Booster Seat: This restraint is not certified for aircraft use, when used as a booster seat, because aircraft seats do not have shoulder belts.”
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
- 3-position base
- Maker lists under 19 in across without the cup holders
Worth checking
- No recline count stated beyond a 3-position base
Where to buy the TriMate
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
| Safety 1st TriMate | |
|---|---|
| Type | All-in-one |
| List price | $149.99 |
| Rear-facing weight | 5–40 lb |
| Rear-facing height | 19–40 in |
| Forward-facing weight | 30–65 lb |
| Forward-facing height | 34.4–49 in |
| Booster weight | 40–100 lb |
| Booster height | 43.4–52 in |
| Head rule | Rear-facing: the top of your child's head MUST be at least 1 in. (2.5 cm) below the top of the car seat's headrest. Forward-facing: the top of your child's ears MUST be below the top of the car seat's headrest. Booster: the top of your child's ears should never be above the top of the booster seat's headrest. |
| Newborn insert | Body pillow (on select models), optional, rear-facing mode only (TriFit/TriMate manual). |
| Installation | visible belt paths |
| Load leg | No |
| Anti-rebound bar | No |
| Rotates | No |
| Harness heights | 8 |
| Recline positions | 3 |
| Aircraft label | Certified for aircraft, per the maker |
| Expires after | 10 years |
Compare the TriMate with
How each closest rival differs from the TriMate, from the makers' specs.
- Baby TrendJourney 4-in-1rear-facing to 40 lbforward-facing to 65 lb$149.99
- 1 years shorter before it expires
- Safety 1stGrow and Go Sprintrear-facing to 40 lbforward-facing to 65 lb$149.99Compare side by side
- Safety 1stGrow and Gorear-facing to 40 lbforward-facing to 65 lb$159.99
- $10 more
- Safety 1stTriFitrear-facing to 40 lbforward-facing to 65 lb$139.99
- $10 less
TriMate: questions answered
From Safety 1st's published specs, last checked 2026-11-06.
Does the Safety 1st TriMate rear-face longer than other all-in-one seats?
15 of the 70 all-in-one seats we track rear-face to a higher weight than its 40 lb. The highest is the Britax One4Life ClickTight All-in-One at 50 lb. NHTSA: stay rear-facing "until he or she reaches the top height or weight limit allowed by your car seat's manufacturer." (NHTSA)
Can you bring the Safety 1st TriMate on a plane?
Yes, Safety 1st lists it as certified for aircraft; look for the red-lettered label that says so. The FAA asks that a car seat go in a window seat so it doesn't block the aisle, and the crew will look for that label.
Is it OK to buy a used TriMate?
NHTSA publishes guidance on used car seats on its car seat page. Safety 1st lists a lifespan of 10 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 all-in-one car seats
- Baby TrendCover Me 4-in-1rear-facing to 40 lbforward-facing to 65 lb$169.99
- Safety 1stCrosstown All-in-Onerear-facing to 40 lbforward-facing to 65 lb$129.99
- Safety 1stSimple-Click Canopy All-in-Onerear-facing to 40 lbforward-facing to 65 lb$179.99
- Safety 1stSlimRide 4-in-1rear-facing to 40 lbforward-facing to 65 lb$199.99
- GracoTriRide 3-in-1rear-facing to 40 lbforward-facing to 65 lb$199.99
- Safety 1stQuickFitrear-facing to 40 lbforward-facing to 65 lb$99.98
Where these specs come from
- safety1st.com/products/trimate-all-in-one-convertible-car-seat-cc408
- images.salsify.com/image/upload/s--zWAiSKhj--/zuyh2cp3rrpgbbsfuqge
Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.