Diono Connect3 RXT Backless Booster Review: Specs, Pros and Cons

What stands out

• Slim 9.1-inch width fits three-across in many vehicles
• Easy-release LATCH straps for quick removal
• Two removable cup holders nest between seats
• Premium 2TexFoam seat base for comfort
• Built-in carry handle for portability

Who it fits

Diono Connect3 Booster Key Specs

Booster Type: Backless

This design lacks a high back, making the seat significantly lighter and easier to move between vehicles. You can lift and carry it without struggling with bulk. This style is ideal if you frequently transfer seats or need a compact option for tight trunk spaces. It requires a vehicle seat with proper head support for safety.

Width: 9.1 inches

The seat is exceptionally narrow, allowing you to fit three of these units side-by-side in many mid-sized sedans and SUVs. This slim profile maximizes interior legroom for other passengers. If you have multiple children or need extra space for groceries, this narrow width provides practical flexibility that wider boosters cannot match.

Weight Range: 40-120 lbs.

The seat supports children from forty to one hundred twenty pounds. This wide range allows you to keep using the same booster as your child grows from preschool age through the pre-teen years. You avoid the need to purchase a new seat every few years, offering long-term utility for your family.

LATCH Type: Easy-release strap connectors

The installation uses straps with easy-release mechanisms located on the front of the booster. This design allows you to grab and go quickly without fumbling with complex buckles. It simplifies the process of securing the seat to your vehicle, making daily use more convenient and reducing the time spent on setup.

Design and Build Quality

The Diono Connect3 RXT Backless Booster features a slim, backless design optimized for space efficiency. According to the listing, each unit measures 9.1 inches wide, 16.3 inches high, and 15.4 inches long. This narrow profile allows you to fit three seats across in many mid-sized sedans and SUVs. The pack includes two units, totaling 14.9 pounds. This lightweight construction makes it easier to move the seats between vehicles or store them when not in use.

The seat base utilizes premium 2TexFoam material, which the listing states prioritizes comfort alongside safety. This foam construction provides a supportive surface for children weighing between 40 and 120 pounds. The finish is available in Black Storm, Blue Razz Ice, or Pink Cotton Candy. These color options allow you to match the interior aesthetic of your vehicle while maintaining a durable surface for daily use.

Layout controls are integrated directly into the seat structure. The booster includes easy-release LATCH strap connectors located on the front for accessible grab-and-go functionality. A built-in carry handle is also present on each unit, enhancing portability. Additionally, two removable cup holders nest between the seats when installed three-across. They can also be stored under the booster or taken on the go. This integrated storage solution keeps snacks within reach without cluttering the backseat area, ensuring a tidy and organized travel environment for your family.

Setup And Daily Use Guide

Setting up this booster involves securing the seats to your vehicle using the integrated LATCH system. The listing specifies easy-release strap connectors located on the front of the booster. You can grab these straps to attach the seat quickly. The design includes a built-in carry handle, which simplifies moving the unit between cars or storing it when not in use. The slim 9.1-inch width allows you to install three seats side-by-side in many mid-sized sedans and SUVs. The seat contours around the EasyPath lap belt guides to provide EasyReach buckle access, making it easier for your child to latch the seatbelt without awkward positioning.

Daily use focuses on comfort and convenience. The base uses premium 2TexFoam to support your child during travel. Two removable cup holders nest between the seats when installed three-across. You can store these cup holders under the booster when they are not needed or take them along on the go. The booster accommodates children weighing between 40 and 120 pounds. This wide weight range means you can use the seat for several years as your child grows. The black storm color option provides a neutral look that fits most vehicle interiors. The lightweight construction, weighing 14.9 pounds for the pair, ensures you can handle the seats without strain. The backless design keeps the profile low, allowing your child to see out the window comfortably. You simply place the seat on the vehicle cushion, thread the lap belt through the guides, and buckle it in. The easy-release straps allow you to detach the seat from the vehicle anchors in seconds for transport.

Check Compatibility Before Buying

You need to verify your vehicle’s LATCH anchor locations before purchasing. This seat uses front-mounted easy-release straps, so check that your car’s lower anchors are accessible from the front seat area. The 9.1-inch width allows three-across fitment in many mid-sized sedans and SUVs, but you must measure your actual backseat space to confirm. Since these are backless boosters, your child must meet the 40-pound minimum weight requirement. You will also need to ensure your vehicle’s lap belt or LATCH system supports booster use for children in this weight range. Upkeep is simple; the cup holders are removable for cleaning, and the fabric can be spot-cleaned. This product sits alongside other slim-fit options in our guide, offering a two-pack value for larger families. It prioritizes narrow width and ease of transfer over high-back support. Consider your child’s height and your vehicle’s specific anchor configuration before adding this to your cart.

Check before you buy

• Verify your vehicle’s LATCH anchor accessibility for front-mounted straps.
• Measure your backseat width to confirm three-across fitment.
• Ensure your child weighs at least 40 pounds.
• Check that your vehicle supports backless booster use.

The product at a glance

1

Diono Connect3 RXT Backless Booster 2-Pack

Best for: Fitting three children across the back seat

Booster Type

Backless

Weight Range

40-120 lbs.

LATCH Type

Easy-release strap connectors

Cup Holders

Two removable cup holders

Target Audience

Kids

Features

Lightweight, Latch Connectors

View on Amazon: Diono Connect3 RXT Backless Booster 2-Pack Affiliate link

The Diono Connect3 RXT is a backless booster designed for children weighing 40 to 120 lbs. Its slim 9.1-inch width allows for a 3-across fit in many mid-sized sedans and SUVs. The unit includes two removable cup holders that nest between seats. It features easy-release latch connectors and a built-in carry handle for portability. This pack of two offers a durable, lightweight option for growing kids.

Pros

• Slim 9.1-inch width fits 3-across in many vehicles
• Weight range supports children from 40 to 120 lbs
• Includes two removable cup holders that nest between seats
• Easy-release latch connectors for quick removal

Cons

• No backrest for head or neck support
• Only includes two cup holders for a 3-across setup
• Base is not adjustable for recline

Good fit if

• You need to fit three children across the back seat
• Your child weighs between 40 and 120 lbs
• You want a lightweight booster with integrated cup holders

Skip if

• You require a high-back booster for head support
• Your child weighs less than 40 lbs
• You need individual cup holders for each seat in a 3-across configuration

Verdict: Diono Connect3 RXT Backless Booster provides a slim 9.1-inch profile ideal for fitting three children across the back seat. It suits families prioritizing space efficiency and a wide weight range over head support features.

Specifications side by side

Frequently asked questions

See also

• diono connect3 rxt backless booster alternatives
• best diono black booster car seats
• diono connect3 rxt 2 in 1 high review
• medicube booster pro review