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CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED ‘AS IS’ AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
Price on Amazon.com as of 2026-11-01 20:39 UTC, and subject to change.
An all-in-one car seat with 4 modes: rear-facing harness 5 to 40 lb, 19 to 40 in; forward-facing harness 30 to 65 lb, 34.4 to 49 in; belt-positioning booster (high-back) 40 to 100 lb, 43.4 to 52 in; backless booster 40 to 100 lb, 43.4 to 52 in.
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CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED ‘AS IS’ AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
The Safety 1st EverSlim 4-in-1 (CC419) is a four-mode all-in-one seat. Its product page lists rear-facing 5 to 40 lb and 19 to 40 in., forward-facing 30 to 65 lb and 34.4 to 49 in., and high-back and backless booster 40 to 100 lb and 43.4 to 52 in. The page does not state an expiry or link a manual.
It suits a family that wants a single seat that ends as a backless booster, in the plain Safety 1st fabrics. The main trade-off is how little the page publishes: there is no manual link, no expiry period, no aircraft statement, no width and no lower anchor weight limit, so I would read the manual that comes in the box before installing. The Disney Baby EverSlim lists the same mode limits on its page and links a manual, which this page does not.
A research summary of Safety 1st’s published specifications and manual, read . Not a hands-on test or a crash-safety rating.
This seat covers 4 stages, and a child has to meet every limit of the stage they are in. Check the date label on the shell before using a hand-me-down; every seat has an expiry.
| Mode | Child weight | Child height | Minimum age | Conditions |
|---|---|---|---|---|
| Rear-facing harness | 5 to 40 lb | 19 to 40 in | Not published | — |
| Forward-facing harness | 30 to 65 lb | 34.4 to 49 in | Not published | — |
| Belt-positioning booster (high-back) | 40 to 100 lb | 43.4 to 52 in | Not published | — |
| Backless booster | 40 to 100 lb | 43.4 to 52 in | Not published | — |
A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.
Every install is a fit between one seat and one vehicle. Read both manuals, and use a free inspection station if anything is unclear.
Safety 1st does not publish a width for this seat, so measure your back seat and compare it with the seat in a store before buying.
Office Space, Fiddlehead, Mountain Air.
Safety 1st's page lists rear-facing for 5 to 40 lb and 19 to 40 in., forward-facing for 30 to 65 lb and 34.4 to 49 in., and both the belt-positioning (high-back) booster and the backless booster for 40 to 100 lb and 43.4 to 52 in. The page describes the seat as lasting from infancy through age 10. It also says actual fit may vary and that not all children will comfortably fit in the seat for the full ranges listed. The page gives no age minimums for the modes, so the weight and height limits are the published figures to plan around.
The page lists a one-hand, 10-position adjustable headrest and a base with 5 recline positions, and says the seat converts to a backless booster. The chest clip is a SecureTech clip with a red-to-green indicator that shows when it is fastened. The seat pad and infant inserts are described as machine washable and dryer safe. The page does not give wash temperatures or drying times, so I would follow the care label and the manual in the box. It describes the design as space-saving, without a published width.
The CC419 page has no manual link. Because of that, several facts a parent needs before installing are not published on the page: whether the lower anchors have a child weight limit forward-facing, how the recline positions match the rear-facing level lines, the expiry period, and whether the seat is certified for aircraft use. The page also gives no width, depth or seat weight. I would not assume these match a sibling seat. The manual shipped with the seat and the labels on the shell are the place to confirm them.
No campaign in the current NHTSA child-restraint data names this model family, and I have not run a separate review for it. Check your seat’s model number and date of manufacture before use.
The page lists rear-facing 5 to 40 lb and 19 to 40 in., forward-facing 30 to 65 lb and 34.4 to 49 in., and high-back and backless booster 40 to 100 lb and 43.4 to 52 in.
Safety 1st EverSlim 4-in-1 product page (opens in a new tab)
Yes. The page lists a backless booster mode for 40 to 100 lb and 43.4 to 52 in., and calls it easy to convert.
Safety 1st EverSlim 4-in-1 product page (opens in a new tab)
The CC419 product page does not state an expiry period and does not link a manual. I would check the date of manufacture label on the seat and the manual that comes with it.
Safety 1st EverSlim 4-in-1 product page (opens in a new tab)
The CC419 page does not say whether the seat is certified for aircraft use. Look for an aircraft certification label on the seat before a flight.
Safety 1st EverSlim 4-in-1 product page (opens in a new tab)
The Disney Baby EverSlim page lists the same limits: rear-facing 5 to 40 lb and 19 to 40 in., forward-facing 30 to 65 lb and 34.4 to 49 in., and both boosters 40 to 100 lb and 43.4 to 52 in. It also lists a 5-position base and a 10-position headrest, and adds a claim that it fits 3 across in most vehicles.
Safety 1st Disney Baby EverSlim 4-in-1 product page (opens in a new tab)
The SlimRide page lists the same rear-facing and forward-facing limits, a 5-position base and a 10-position headrest, and its spec list gives the backless booster 43.4 to 57 in. The SlimRide page does not mention the SecureTech chest clip.
Safety 1st SlimRide 4-in-1 product page (opens in a new tab)
Answers refer to the model and manual version on this page. Check the instructions supplied with your seat.
Other all-in-one seats whose published weight and height limits overlap the EverSlim 4-in-1 Convertible Car Seat.
| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness | 5–40 lb | 19–40 in |
| Forward-facing harness | 30–65 lb | 34.4–49 in |
| Belt-positioning booster (high-back) | 40–100 lb | 43.4–52 in |
| Backless booster | 40–100 lb | 43.4–57 in |
$259.99Vintage Mickey Mouse 2 · Amazon price as of 2026-11-01 20:39 UTC, subject to change
| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness | 5–40 lb | 19–40 in |
| Forward-facing harness | 30–65 lb | 34.4–49 in |
| Belt-positioning booster (high-back) | 40–100 lb | 43.4–52 in |
$129.99Deep Sea 2 · Amazon price as of 2026-11-01 20:39 UTC, subject to change
| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness | 5–40 lb | 19–40 in |
| Forward-facing harness | 30–65 lb | 34.4–49 in |
| Belt-positioning booster (high-back) | 40–100 lb | 43.4–52 in |
$139.99Price on safety1st.com as of 2026-10-07 05:49 UTC, subject to change
| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness | 5–40 lb | 19–40 in |
| Forward-facing harness | 30–65 lb | 34.4–49 in |
| Belt-positioning booster (high-back) | 40–100 lb | 43.4–52 in |
$239.98Mickey Sprinkle · Amazon price as of 2026-11-01 20:39 UTC, subject to change
