Special Nonexistent Furniture
SKU #: DDH1023

Diono Sit Rite Vehicle Seat

(View all from Diono)

(for set of 4 items)

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Diono Sit Rite Vehicle Seat

Today's contoured vehicle seats often tilt infant carriers back towards rear of seat, positioning infants at incorrect angle. Sit rite helps to level rear-facing child safety seats and position infants at proper angle. Forget rolled-up towels. Sit rite will not flatten during tightening and installation, and dense foam construction adds firm, lateral support to vehicle seat to help discourage sideways tipping. Sit rite fits all rear-facing safety seats and infant carrier bases and is latch compatible. Crash-tested.


  • High density polyethylene foam for less compression for better support
  • Size and shape based on recommendations from safety community
  • Can be cut to any length to fit any width vehicle seat


  • Overall: 3" H x 15.5" W x 3" D
  • Overall Product Weight: 0.15lbs

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Diono Sit Rite Vehicle Seat

Additional Documents


Weights & Dimensions

  • Overall: 3" H x 15.5" W x 3" D
  • Overall Product Weight: 0.15lbs


Product Type: SafetyColor: Grey
Material: Plastic
  • Material Details: Foam
Number of Items Included: 1
Non Toxic: YesUniversal: Yes
Rocker: NoWheels: No
Gender: UnisexLifestage: Baby; Kid
Straps: NoHandles: No
Machine Washable: NoDishwasher Safe: No
Country of Manufacture: China 


Assembly Required: NoAdditional Parts Required: No


Product Warranty: One year warranty 

About the Manufacturer

Diono products are the ideal solution for today's "on the go" family, with state-of-the-art product designs that combine safety and convenience so that every family excursion can be the enjoyable experience it was meant to be. Today, with more than 100 product offerings available in 54 countries worldwide and company offices in the U.S., the United Kingdom, Canada and Germany, Diono continues to answer families' everyday needs with car seats, storage solutions, and related travel and stroller accessories that have earned the trust and respect of parents around the globe.

Diono Sit Rite Vehicle Seat

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When you buy a Diono Sit Rite Vehicle Seat online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Diono Part #: 40140 here. If you have any questions about your purchase or any other Car Seat Accessories product for sale our customer service representatives are available to help.Whether you just want to buy a Diono Sit Rite Vehicle Seat or shop for your entire home, Wayfair has a zillion things home.

NOTE: This product is subject to a minimum order quantity of  4

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Customer Reviews

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Average Overall Rating:
(based on 4 reviews)

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Does its job

Marina from Round Rock, TX– Verified Buyer– Top 1000 Reviewer

This little "miniature pool noodle" helps you get a good tight install at the right angle for your rearfacing infant seat, and eliminates the need for a rolled up towel.
Does its job fine when needed.
But if you have issues installing your car seat, please seek help from a certified car seat tech!

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MamaBear from Florida– Verified Buyer

Exactly what I expected. Have been using this for over a year and has held up well, no problems at all.

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Helps get a perfect install

Emma from west bloomfield, MI– Verified Buyer

Our car seat was angled incorrectly and did not feel safe. After the installation of this, we managed to get a proper fit and the car seat is more secure

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Very pleased

Fran from CA– Verified Buyer

I am very happy with my purchase overall. It arrived quickly, it is as it was described & it seems well made. I would buy this again. I would recommend Wayfair & this product.

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