Diono Monterey 4DXT vs UPPAbaby Alta V2

The Alta V2 is 3 in narrower.

Only the differences are shown.

Diono Monterey 4DXTUPPAbaby Alta V2
TypeBoosterBooster
List price$199.99$199.99
Booster weight40–120 lb40–100 lb
Booster height38–63 in38–57 in
Seat weight18.3 lb17 lbLightest
Width20.5 in17.5 inNarrowest
Head ruleNot listedThe child's ears MUST be below the top of the booster headrest.
Installationautomotive steel LATCH connectors with two easy-adRigid LATCH, seat belt
Load legNot listedNo
Anti-rebound barNot listedNo
RotatesNot listedNo
Aircraft labelNot certified for aircraftNot certified for aircraft
No added flame retardantsNot listedYes
Expires after8 yearsNot listed

Diono Monterey 4DXT

  • Maker lists automotive steel LATCH connectors and two easy-adjust LATCH straps
  • Maker lists an 11-position headrest and a backrest that expands up to 6.5 in (16.5 cm)
  • Converts to backless booster with detachable back per maker
  • Maker states Diono booster seats are not meant to be used on airplane

UPPAbaby Alta V2

A slim high-back booster with rigid LATCH, a 7-position headrest and one-handed recline.

  • Slim 17.5 in profile
  • Rigid LATCH
  • Fire-retardant-free fabrics and foams
  • Max 100 lb
  • 17 lb
Ask the meadow

Monterey 4DXT or Alta V2?

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 Monterey 4DXT or the Alta V2?

The Diono Monterey 4DXT: it goes booster, up to 120 lb. The Alta V2 goes booster, up to 100 lb. The Monterey 4DXT expires after 8 years.

Which is easier to travel with?

Monterey 4DXT: 18.3 lb. Alta V2: 17 lb. Neither lists aircraft certification.

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