Britax Grow with You Harness-to-Booster vs Joie bay latch SI plus

The Grow with You Harness-to-Booster lists for $30 less.

Only the differences are shown.

Britax Grow with You Harness-to-BoosterJoie bay latch SI plus
TypeHarness-to-boosterHarness-to-booster
List price$239.99Lowest price$269.99
Forward-facing weight30–65 lb30–65 lb
Forward-facing height35–49 in27–49 in
Booster weight40–120 lb40–120 lb
Booster height44–63 inUp to 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 lower anchors (LATCH) forward-facing + top tether (harness, child up to 40 lb), seat belt forward-facing + top tether (harness), rigid lower anchors + vehicle belt + top tether (harness, over 40 lb), high-back booster: lap/shoulder belt, rigid lower anchors optional, backless booster: lap/shoulder belt, rigid lower anchors optional
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 plus

    Ask the meadow

    Grow with You Harness-to-Booster or bay latch SI plus?

    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 plus: certified for planes, 23.7 lb.

    What does the extra $30 for the bay latch SI plus get you?

    No extra listed feature from the ones we track (load leg, anti-rebound bar, rotation, flame retardants). Compare fabrics, ease of install, and fit in your car. Both meet the same federal crash standard.

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