Britax Grow with You Harness-to-Booster vs Joie Bay Latch SI 3-in-1 Harness Booster

Side-by-side specs from each maker.

Only the differences are shown.

Britax Grow with You Harness-to-BoosterJoie Bay Latch SI 3-in-1 Harness Booster
TypeHarness-to-boosterHarness-to-booster
List price$239.99$239.99
Forward-facing weight30–65 lb30–65 lb
Forward-facing height35–49 in27–49 in
Booster weight40–120 lb40–120 lb
Booster height44–63 in43–60 in
Seat weight23 lbLightest23.7 lb
WidthNot listed19 in
Head ruleThe top of the child's ears must be below the top of the head restraint when seated (harness and booster modes); harness straps must be in the closest position at or above the child's shouldersForward-Facing: The harness straps MUST be AT or JUST ABOVE the child's shoulders. For forward-facing harnessed mode, DO NOT use the headrest higher than indicated on the label on the child restraint (headrest position 11 as indicated under the backrest softgoods).
InstallationLATCH forward-facing + top tether (harness, child up to 45 lbs), seat belt forward-facing + top tether (harness), booster: vehicle lap-shoulder belt (lower anchors may be used to position the seat)rigid LATCH, vehicle seat belt
Load legNoNo
Anti-rebound barNoNo
RotatesNoNo
Harness heights9Not listed
Recline positions2Not listed
Aircraft labelCertified for aircraft, per the makerCertified for aircraft, per the maker
No added flame retardantsYesNot listed
Expires after9 years10 years

Britax Grow with You Harness-to-Booster

A forward-facing harness seat that converts to a belt-positioning booster up to 120 lb, without ClickTight.

  • Harness to 65 lb, booster to 120 lb
  • Lighter than the ClickTight version
  • Nine-year life
  • No rear-facing mode

Joie Bay Latch SI 3-in-1 Harness Booster

A forward-facing harness seat with rigid LATCH that converts to high-back and then backless booster, covering children up to 60 in.

  • Rigid LATCH
  • Harness to 65 lb, backless booster to 120 lb
  • Ten-year life
  • No rear-facing mode
Ask the meadow

Grow with You Harness-to-Booster or Bay Latch SI 3-in-1 Harness Booster?

Answers come from each maker's published specs. Safety and health questions link to the agency or medical source.

Which is easier to travel with?

Grow with You Harness-to-Booster: certified for planes, 23 lb. Bay Latch SI 3-in-1 Harness Booster: certified for planes, 23.7 lb.

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