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Cosco

Cosco Topside Backless Booster Car Seat, Lightweight Booster Seats for Cars 40-100 lbs, Backless Booster Seat for Car, Organic Waves

  • Based on 13,947 reviews
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Color: Organic Waves


Size: 1 Pack


Features

  • GIVE YOUR CHILD A LIFT: The booster seat for kids 40-100 lbs provides extra height to keep seatbelts properly positioned. The car seat booster is comfortable for children measuring 43.4"-57".
  • MADE FOR GROWING KIDS: Designed for children weighing 40-100 lbs and measuring 43.4"-57", this child booster seat for car is a versatile kids booster seat for children 40-100 lbs and measuring 43.4"-57".
  • LIGHTWEIGHT, COMPACT DESIGN: Our booster carseat is easy to move between vehicles, perfect for families needing a portable car booster seat. Ideal as a travel booster seat for convenient use on the go.
  • MAKE CAR RIDES MORE COMFORTABLE: This booster car seat features extra-plush padding, making for a happier ride. The fabric cover of the travel booster seat is hand-wash only.
  • SEAT FRIENDLY DESIGN: This car booster seat helps keep your vehicle seats unmarked.

Description

Give your child a comfy lift with the Cosco Kids™ Topside Booster, featuring an extra-plush pad. This kids booster car seat gives kids the extra height they need to keep seatbelts properly positioned. Super lightweight, it’s simple to move from car to car and offers a seat-friendly design that won’t scuff or leave indentations on your vehicle seats. Comfy and lightweight, the Topside Booster is great for families on the go. Designed for kids 40–100 lbs. and 43"–57". Whether you're traveling with your little one or simply running errands, this car booster seat provides a comfortable journey. Make every ride smoother and more enjoyable with the Topside kids booster seats for cars 40-100 lbs. and 43"–57". El asiento para niños de carro also features a hand- washable fabric cover, making it easy to keep clean.

Maximum Weight Recommendation: 100 Pounds


Maximum Height Recommended: 57 Inches


Installation Type: Seat Belt


Orientation: Forward Facing


Harness Type: 3-Point


Number of Height Positions: 1


Brand: Cosco


Age Range Description: Kid


UPC: 884392952150


Manufacturer: Dorel Juvenile Group


Part Number: BC030GZT


Model Number: BC030GZT


Item Type Name: Booster Car Seats


Unit Count: 1.0 Count


Item Dimensions D x W x H: 14"D x 15.5"W x 6.5"H


Material Type: Polypropylene


Color: Organic Waves


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Perfect Booster Seat for Everyday and Long Trips
Color: Organic Waves Size: 1 Pack
We are really happy with this backless booster seat. From the start, it felt sturdy and well-made, which gave us peace of mind. Our child finds it very comfortable, even on longer car rides, and the design makes it so easy for them to buckle themselves in without help. That’s been a huge convenience for us as parents. We recently took it on a long road trip, and it proved itself even more. After hours in the car, our child stayed comfortable, and when we had a few spills and crumbs (as always happens with kids), it was surprisingly easy to clean. Everything wiped right off, and the seat looked good as new. The booster is lightweight enough to move between cars quickly but still feels solid once it’s in place. Overall, it’s safe, reliable, and parent-friendly, and our child genuinely likes it. I’d recommend it to anyone looking for a no-fuss, dependable booster seat for everyday use and longer trips alike. ... show more
Reviewed in the United States on September 8, 2025 by Daniela McLea
    • Lightweight, Comfortable, and Perfect for Quick Car Swaps
Color: Grape Size: 1 Pack
This Cosco backless booster is exactly what you want when you need a simple, reliable booster seat that’s easy to move between cars. It’s lightweight, comfortable for kids, and does the job without taking up a ton of space. 🔹 Easy to Use & Travel-Friendly Super light and easy to carry, which makes it perfect for carpools, grandparents’ cars, or switching between vehicles. No complicated setup—just place it and buckle in. 🔹 Comfortable & Kid-Friendly The seat has enough padding to keep kids comfortable on longer rides, and the armrests help position the seatbelt properly. Plus, the color options are fun and look great. ✅ Pros: Very lightweight and easy to move between cars Simple setup with no hassle Comfortable padding for kids Great price for a dependable booster Doesn’t take up much space ❌ Cons: No back support (not ideal for kids who still need it) No LATCH system, so it can slide around when empty Overall: A great affordable booster seat that’s perfect for everyday use, travel, and quick car changes. If your child is ready for a backless booster, this is an excellent pick. ... show more
Reviewed in the United States on January 13, 2026 by Amazon Customer
    • Great for a transition seat
Color: Grape Size: 1 Pack
For the amount spent this is great. My daughter is almost out of a booster this is just enough for her lightweight and easy to move seat to seat
Reviewed in the United States on March 18, 2026 by Anthony D Soria
    • Good product!
Color: Rainbow Size: 1 Pack
I babysit my grandchildren. It was time to switch from a regular carseat to a booster. After reading some reviews I decided to purchase this one. It's a hit will my granddaughter. She likes the colors. She says it's comfortable. It seems to be made nicely. It doesn't take up a lot of room, so I can remove it easily when not in use. It was a great value. When it's time to replace the next one I will be ordering another one. ... show more
Reviewed in the United States on February 4, 2026 by M.H.
    • Great booster seat, but could be softer
Color: Leo Size: 1 Pack
Review Image by MiMi
The seat is comfortable and lightweight — my child likes it, and it’s easy to move from one car to another. The fabric feels nice to the touch, doesn’t slip, and looks neat. The seat belt fits correctly, and my child sits securely. The only downside is that I wish the seat had a bit more cushioning, especially for longer trips. ... show more
Reviewed in the United States on October 22, 2025 by MiMi
    • Affordable
Color: Turquoise Size: 1 Pack
As described. Bought as a cheap secondary booster seat for an additional car in our household. Really affordable, simple booster for my 7YO who is not tall enough to sit in a regular seat yet.
Reviewed in the United States on April 2, 2026 by Rachel
    • Great buy!
Color: Grape Size: 1 Pack
Easy to use, safe for my 6yr, doesn't take up much space & can adjust to different seats if needed.
Reviewed in the United States on April 17, 2026 by Asia
    • Very convenient.
Color: Leo Size: 1 Pack
We just use this as a back up in our 2nd car which we don’t use as a family often. It’s really nice to have something small and light for that role.
Reviewed in the United States on April 14, 2026 by Mott

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