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Big Boost Deluxe With UAS

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Big Boost Deluxe With UAS

Belt-positioning booster car seat with UAS system, forward-facing 18.1-50 kg (40-110lbs).

Download instruction manual

SKU: 0304018CBR


Let your big kid ride in plush cushy comfort in the Harmony Big Boost Deluxe with UAS. This award winning forward-facing booster car seat is for children 18.1-50 kg (40-110lbs) and 101.6-144.8 cm (40-57 inches) tall.

The Big Boost Deluxe booster seat comes with a 1-hand, up-front adjustable Latch system allowing you to easily attach the unit to the vehicle, and prevents the booster from moving when unused. The deluxe seat pad is made with extra comfort foam which is great for those long rides, and is easily removable and machine washable. As well, it is specially designed to keep the seatbelts properly routed on your child and the visually pronounced belt guides make installation quick and easy. The Harmony Big Boost Deluxe is also equipped with a cup holder and a shoulder safety belt guide.

Compare the Safety, Comfort and Ease of Use and you will see the Harmony difference.

Product Features

  • WINNER 2016 - 2019 IIHS BEST BET Award.
  • Exceeds Canadian CMVSS 213 standards.
  • Extended weight range: Fits children: 18.1-50 kg (40-110lbs) and 101.6-144.8 cm (40-57 inches) tall.
  • Unique V-Shape design promotes easier and safer installations allowing a better fit in any type of vehicle.
  • Unique lumbar support.
  • 1-hand, up-front adjustable UAS system (Universal Anchorage System) secures the booster to the vehicle seat.
  • Anti-submarining belt path design prevents the child from sliding under the lap belt on impact.
  • Ultra-plush seat pad made with durable, premium fabrics and extra high-density comfort foam, provides exceptional comfort.
  • Full wrap premium seat pad is removable for machine washing. 
  • The visually pronounced belt guides promote correct installment of the seat belt. 
  • Cup/snack holder included.
  • Shoulder belt guide included.
  • 3-month warranty


Width: 17.7" (45 cm)
Depth: 15.75" (40 cm)
Height: 8" (20.32 cm)


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