Diono Monterey XT High Back Booster - Heather

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Diono Monterey XT High Back Booster Car Seat-Heather Grey

The Monterey XT booster seat is an expandable seat designed to fit children as they grow from 40 lbs to 120 lbs. With an adjustable head rest and aluminum-reinforced sides lined with energy-absorbing EPS foam to offer side impact protection, as well as a contoured seat to ensure a correct seating position, the Monterey XT is not only safe and secure, but is also comfortable for your child.

Offering tremendous flexibility, the Monterey XT can adjust for shoulder width up to 20” with the turn of a dial. The headrest offers one-handed adjustability up to 6.5” in height, with 11 positions for a precise fit.

Other safety features include integrated UAS connectors and front adjustors, allowing for a safe, secure installation in mere seconds, and keeping the seat in position when not in use.

Wipeable fabrics and a removable, washable cover means that the Monterey XT is a snap to look after and keep clean.


  • Fits children weighing 40 lbs to 120 lbs and between 38″ and 63″ in height
  • Aluminum side walls are extra deep and lined with EPS foam for superior protection from side impact
  • Expandable seat back adjusts to fit shoulders up to 20” wide
  • Headrest with one-handed height adjustment up to 6.5”, with 11 position options
  • Ergonomically-contoured seat prevents submarining (when a child slips below the lap belt during a collision), while extra padding provides comfort
  • UAS system for secure installation (UAS use is optional)
  • Retractable cup holders are extra deep to keep drinks upright
  • Easily convertible to a backless booster
  • Removable cover for easy cleaning. Machine wash in gentle cycle and dry
  • Two retractable snack trays that fold away when not in use
  • Packs flat for travel and storage

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