Britax Grow with You ClickTight Harness-to-Booster vs Harmony Defender 360° MAX 3-in-1 Deluxe

Side-by-side specs from each maker.

Only the differences are shown.

Britax Grow with You ClickTight Harness-to-BoosterHarmony Defender 360° MAX 3-in-1 Deluxe
TypeHarness-to-boosterHarness-to-booster
List price$349.99Not listed
Forward-facing weight30–65 lb26.5–65 lb
Forward-facing height35–49 in27–57 in
Booster weight40–120 lb40–120 lb
Booster height44–63 in34–57 in
Seat weight25 lb18 lbLightest
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 shouldersHarness mode: Child's ears MUST BE BELOW top of the headrest.
Newborn insertNot listedInfant insert cushion: 'Harmony recommends that you use the infant insert cushion until your child has reached a minimum of 35 pounds (15.8 kg).'
InstallationClickTightLATCH (harness mode, not over 50 lbs), vehicle lap-and-shoulder belt, vehicle lap-only belt (harness mode), top tether (harness mode)
Load legNoNo
Anti-rebound barNoNo
RotatesNoNo
Harness heights99
Recline positions2Not listed
Aircraft labelCertified for aircraft, per the makerCertified for aircraft, per the maker
Expires after9 years10 years

Britax Grow with You ClickTight Harness-to-Booster

A forward-facing harness seat with ClickTight belt installation that converts to a belt-positioning booster up to 120 lb.

  • ClickTight installation
  • Harness to 65 lb, booster to 120 lb
  • Nine-year life
  • No rear-facing mode
  • 25 lb

Harmony Defender 360° MAX 3-in-1 Deluxe

  • Manual lists harness use 22 - 65 pounds and booster use 40 - 120 pounds
  • Manual lists aircraft certification with the harness
  • Manual lists a one-hand headrest button
  • Manual says forward-facing only; no rear-facing limits
Ask the meadow

Grow with You ClickTight Harness-to-Booster or Defender 360° MAX 3-in-1 Deluxe?

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 ClickTight Harness-to-Booster: certified for planes, 25 lb. Defender 360° MAX 3-in-1 Deluxe: certified for planes, 18 lb.

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