Diono Monterey 4DXT vs Diono Monterey 6DXT SafePlus High-Back Booster

The Monterey 6DXT SafePlus High-Back Booster is 2.8 in narrower. The Monterey 4DXT lists for $10 less.

Only the differences are shown.

Diono Monterey 4DXTDiono Monterey 6DXT SafePlus High-Back Booster
TypeBoosterBooster
List price$199.99Lowest price$209.99
Booster weight40–120 lb40–120 lb
Booster height38–63 in38–63 in
Seat weight18.3 lb16.3 lbLightest
Width20.5 in17.7 inNarrowest
Head ruleNot listedDO NOT use this child restraint backless unless there is a vehicle headrest for that seating position.
Installationautomotive steel LATCH connectors with two easy-adLATCH
Load legNot listedNo
Anti-rebound barNot listedNo
RotatesNot listedNo
Aircraft labelNot certified for aircraftNot certified for aircraft
Expires after8 years8 years

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

Diono Monterey 6DXT SafePlus High-Back Booster

High-back belt-positioning booster from Diono with LATCH connectors; the backless mode requires a vehicle headrest.

  • Lists a 40-120 lb range
  • LATCH connectors for attaching the booster
  • Backless use is allowed with a vehicle headrest
  • Maker states it cannot be used on an airplane
  • Maker's age guidance is only 'typically five years'
Ask the meadow

Monterey 4DXT or Monterey 6DXT SafePlus High-Back 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?

Monterey 4DXT: 18.3 lb. Monterey 6DXT SafePlus High-Back Booster: 16.3 lb. Neither lists aircraft certification.

What does the extra $10 for the Monterey 6DXT SafePlus High-Back Booster 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.