Diono Monterey 5iST FixSafe High Back Booster Car Seat with Expandable Height and Width, Compact Fold to Full Size Booster, Foldable, Portable Booster for Go-Anywhere Travel, Yellow Mineral
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Diono Monterey 5iST FixSafe High Back Booster Car Seat with Expandable Height and Width, Compact Fold to Full Size Booster, Foldable, Portable Booster for Go-Anywhere Travel, Yellow Mineral

4.0/5
Product ID: 369729417
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Details

  • Brand
    Diono
  • Installation Type
    Seat Belt
  • Material
    Polypropylene
  • Color
    Yellow Mineral
  • Orientation
    Forward Facing
🎒Folds to carry-on size for ultimate portability
📏12-position adjustable headrest & backrest
🛡️8 layers of side impact protection

Description

🚗 Elevate every journey with the booster that grows, protects, and travels with you!

  • GROW WITH YOU COMFORT - 12-position SafePlus headrest and backrest expand up to 20 inches wide, adapting seamlessly as your child grows from 40 to 120 lbs.
  • EFFORTLESS INSTALLATION - SafePlus rigid LATCH connectors and quick-release latch button make switching cars or storage a breeze in under 2 minutes.
  • TRAVEL READY PORTABILITY - Folds down to 25% smaller than average boosters with integrated carry handle and straps—perfect for busy parents on the go.
  • COMFORT MEETS CONVENIENCE - Deep padded cushioning with premium machine-washable fabrics and a built-in removable cup holder keep your big kid cozy and hydrated.
  • UNMATCHED SAFETY ENGINEERING - 8 layers of reinforced aluminum and energy-absorbing foam deliver industry-leading side impact protection for peace of mind on every ride.

The Diono Monterey 5iST FixSafe is a high-back booster seat designed for children 40-120 lbs and up to 63 inches tall. It features a 12-position adjustable headrest and backrest that expand up to 20 inches in width, providing up to 85% more room as your child grows. Engineered with 8 layers of side impact protection including reinforced aluminum and energy-absorbing foam, it ensures top-tier safety. The seat folds compactly to carry-on size with integrated handles and straps for easy portability. Installation is quick and secure with SafePlus rigid LATCH connectors, making it ideal for families on the move. Premium padded fabrics are machine washable, and a removable cup holder adds convenience for long trips.

Specifications

Product Dimensions15 x 17 x 24.8 inches
Item model number15705
Is Discontinued By ManufacturerNo
Minimum weight recommendation40 Pounds
Maximum weight recommendation120 Pounds
Minimum height recommendation38.2 Inches
Maximum height recommendation63 Inches
Material TypePolypropylene, Alloy Steel, Plastic, Polystyrene
Material Composition100% Polyester
Care instructionsCovers: Machine wash cold, line dry. Shell and Components: Spot clean
Additional product featuresTransforms in seconds from a compact fold to a full-size booster seat, without compromising safety or comfort
Number of reclining positions12
Batteries requiredNo
OrientationForward Facing
Forward-facing minimum child weight40 Pounds
Forward-facing maximum child weight120 Pounds
Harness typeSeat Belt
Is portableYes
Item Weight18.74 pounds

Have a Question? See What Others Asked

can this be used by a young adult with autism and sensory issues ......?
Will this booster work in the center seat?
Does this seat also have a tether top anchor?
What is the depth of the seat when installed? How much room does the child have on the seat when they are sitting?

Reviews

4.0

All from verified purchases

A**A

Good item but cannot benefit from all features

Good car seat, great material, strong but I have a jeep patriot, cannot benefit on moving the head rest because of the way of the jeep’s seat; also, the car seat gets tight to the back and block the jeep seatbelt making difficult each connection. I had to buy a seatbelt extension to be able to connect it.

M**M

Not for tall, slim kids.

The concept is good, and I love the travel/foldability of it. Unfortunately it takes design cues from general clothing sizes of small, medium and large - meaning if a child had a tiny waist, he/she must be short. Or, if tall, they must be extremely wide. The height and width expansion cannot be adjusted separately. There’s no option for *just* raising the height. To accommodate a child 48” tall the kid probably needs to be 60+ pounds. My high school son, obviously too old for a booster, is 5’6” & 116lbs of muscle didn’t even come close to needing the seat expansion at the highest headrest setting. The idea is ok, but clearly designed for todays *ahem* “larger” children, not super slim or even low-average BMI kids. FWIW, I’m 5’7” and 140. I fit in the seat width wise. How is it supposed to fit my 1st grader who is 100lbs lighter than me?!?My kid is thin, 48” and 40.5 pounds soaking wet. She *barely* meets the regulation weight for a booster but since our car got the best safety rating I relented & said she can use a high back booster in that car. I regret it. Returning it. I need a thin, slim seat to fit in a model 3; one safe enough for local streets (under 45mph/to - from school) - this was almost perfect but not quite.

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Diono Monterey 5ist Fixsafe High Back Booster Car Seat Expandable | Desertcart GERMANY