Diono Monterey 5iST FixSafe LATCH Booster Seat

High-back support that folds for easier travel

Monterey 5iST FixSafe is a folding high-back belt-positioning booster for children from 40–120 lb and 38–63 in tall. Its SafePlus® headrest and backrest adjust together through 12 positions, while rigid FixSafe LATCH connectors attach the seat to compatible vehicle lower anchors.

Feature Visual Guide

Comfort for Growing Riders

Deep cushioning and a contoured seat support the child throughout the booster range.

Compact Folding Design

The high-back booster folds for easier carrying, vehicle changes and storage.

Carry-On-Size Fold

Folded dimensions of approximately 25.7 × 18.5 × 9.5 in create a compact travel profile.

Removable Cup Holder

The included cup holder keeps a drink close and detaches when it is not needed.

Rigid FixSafe LATCH

Rigid lower connectors attach to compatible vehicle anchors and release with the front button.

Independent Height and Width Adjustment

The headrest and side wings adjust separately to support a growing child through the stated range.

SafePlus Testing Program

Diono identifies rollover, rear-impact, side-impact and twice-force crash testing for this model.

Accessible Buckle Area

The seat shape leaves the vehicle buckle area accessible for independent buckling with an adult fit check.

Key Features

• Belt GuidesSafePlus® belt guides help position the vehicle lap-and-shoulder belt.
• Machine-Washable CoverThe contoured fabric cover removes for machine washing according to the manual.
• Eight-Year Life SpanDiono states an eight-year usable life beginning from purchase, or manufacture when purchase date is unavailable.

Specifications

What's Included

• Monterey 5iST FixSafe booster seat
• Removable cup holder
• Instruction manual

Frequently Asked Questions

Care & Use

Remove and machine wash the fabric cover as directed by the care label and owner’s manual. Spot-clean the shell and components.

Owner's Manual

View Owner’s Manual (PDF) — English, French, Spanish