Graco Nautilus SnugLock Grow 3-in-1
The Graco Nautilus SnugLock Grow 3-in-1 forward-faces up to 65 lb, is 19.4 in wide, and weighs 20.3 lb, per Graco.
DiscontinuedNo longer made or sold new. Specs are kept for comparing generations.
- 65 lbHarness to
- 120 lbBooster to
- 20.28 lbSeat weight
- 19.37 inWidth
Nautilus SnugLock Grow 3-in-1: key facts
- The Graco Nautilus SnugLock Grow 3-in-1 forward-faces with a harness from 22 to 65 lb; works as a booster from 40 to 120 lb, per Graco.
- It's 19.4 in wide at the widest point and weighs 20.3 lb.
From Graco's published specs. Always follow the limits on your seat's labels.
How the Nautilus SnugLock Grow 3-in-1 stacks up
Against the 23 harness-to-booster car seats we track. The shaded band is where the middle half of them fall; the dot is this one.
The same as most harness-to-booster car seats (65 lb).
Within the typical range for harness-to-booster car seats (18.3 in to 19.4 in).
Within the typical range for harness-to-booster car seats (16 lb to 25 lb).
Where to buy the Nautilus SnugLock Grow 3-in-1
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- Discontinued. You may still find it used or on clearance.
- 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
| Graco Nautilus SnugLock Grow 3-in-1 | |
|---|---|
| Type | Harness-to-booster |
| Forward-facing weight | 22–65 lb |
| Booster weight | 40–120 lb |
| Seat weight | 20.28 lb |
| Width | 19.37 in |
| Load leg | No |
| Anti-rebound bar | No |
| Rotates | No |
| Harness heights | 11 |
| Recline positions | 4 |
Compare the Nautilus SnugLock Grow 3-in-1 with
How each closest rival differs from the Nautilus SnugLock Grow 3-in-1, from the makers' specs.
- HarmonyDefender 360° 3-in-1 Deluxeforward-facing to 65 lb10-year expirationCompare side by side
- NunaLUMNforward-facing to 65 lb18.3 in wide
- 1.1 in narrower
- 5.9 lb heavier
- HarmonyDefender 360° MAX 3-in-1 Deluxeforward-facing to 65 lb18 lb
- 2.3 lb lighter
- Safety 1stBoost-and-Goforward-facing to 65 lb10-year expirationCompare side by side
Nautilus SnugLock Grow 3-in-1: questions answered
From Graco's published specs, last checked 2026-11-06.
Will the Graco Nautilus SnugLock Grow 3-in-1 fit three across or in a small car?
It's wider than 71% of the harness-to-booster seats we track, at 19.4 in. The narrowest is the Chicco MyFit ClearTex Harness + Booster at 17.5 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.
Is it OK to buy a used Nautilus SnugLock Grow 3-in-1?
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 harness-to-booster car seats
- GracoNautilus 2.0 LX ft. InRight LATCH 3-in-1forward-facing to 65 lb19.4 in wide
- GracoNautilus 2.0 3-in-1forward-facing to 65 lb19.4 in wide
- ChiccoMyFit Zip Airforward-facing to 65 lb17.5 in wide
- BritaxGrow with You ClickTight Harness-to-Boosterforward-facing to 65 lb25 lb$349.99
- ChiccoMyFit Air ClearTex Harness + Boosterforward-facing to 65 lb17.5 in wide$269.99
- Joiebay latch SI plusforward-facing to 65 lb19 in wide$269.99
Where these specs come from
Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.