Harmony Youth Booster vs UPPAbaby Alta

Side-by-side specs from each maker.

UPPAbaby AltaList price not published

Only the differences are shown.

Harmony Youth BoosterUPPAbaby Alta
TypeBoosterBooster
Booster weight40–110 lb40–100 lb
Booster height40–57 in38–57 in
Head ruleChild's ears MUST be below the top of the vehicle seat back/vehicle headrest.IMPORTANT: The child’s ears MUST be below the top of the booster headrest.
Installationvehicle 3-point lap-and-shoulder belt onlyvehicle lap-shoulder belt, rigid lower anchor connectors + vehicle lap-shoulder belt
Load legNoNo
Anti-rebound barNoNo
RotatesNoNo
Aircraft labelNot certified for aircraftNot certified for aircraft
Expires after6 yearsNot listed

Harmony Youth Booster

Harmony backless belt-positioning booster, model HMYBBLNYB-S6 per its US manual, used with the vehicle lap-and-shoulder belt.

  • Maker states 40-100 lb and 40-57 in on the manual cover
  • Maker states the expiry date is on the underside of the base
  • Manual states it is not compatible with LATCH
  • Manual gives no seat weight, dimensions or age range

UPPAbaby Alta

    Ask the meadow

    Youth Booster or Alta?

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

    Which one will my child use longer, the Youth Booster or the Alta?

    The Harmony Youth Booster: it goes booster, up to 110 lb. The Alta goes booster, up to 100 lb. The Youth Booster expires after 6 years.

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