how to take the back off a britax booster seat Britax UpNGo Backless Booster Car Seat

how to take the back off a britax booster seat Britax UpNGo Backless Booster Car SeatThe UpNGo backless seat booster gives your child the boost they need to move up into the final car seat stage and go anywhere with confidence. Designed for children from 40 120 lbs and 46 63", this booster combines the portability and convenience that parents look for with kid approved comfort and style. UpNGo is innovatively designed with PosturePlus to help encourage proper posture and seat belt positioning. It also includes a shoulder belt guide to

The UpNGo™ backless seat booster gives your child the boost they need to move up into the final car seat stage and go anywhere with confidence. Designed for children from 40-120 lbs and 46”-63", this booster combines the portability and convenience that parents look for with kid-approved comfort and style. UpNGo is innovatively designed with PosturePlus™ to help encourage proper posture and seat belt positioning. It also includes a shoulder belt guide to help keep the seat belt in the right place. The slim 17.1” SpaceSaver™ design means there’s more room for siblings or carpoolers, and the soft cushioning and large, padded armrests give your child that extra boost of comfort. Whether they're heading out for a shopping trip with grandma or hopping in with a friend on their way to a sleepover, they’ll feel confident navigating big-kid trips with this lightweight and easy-to-carry booster. They can keep their favorite after-school snacks and drinks close at hand in the two cup holders, which are dishwasher-safe for easy cleanup. The booster seat cover is safe to machine wash and dry, and it’s naturally flame-retardant with no added FR chemicals. The color-coded belt guides help kids learn how to buckle up correctly as they make the final car seat transition, setting them up for safety no matter where their journey takes them.

• Boost, Buckle, Go: Belt-positioning booster lifts your child up to use the vehicle seat belt. 
• Extended Maximum Capacity: Designed for children from 40-120 lbs and 46”-63".    
• PosturePlus™ Contoured Seat: Helps encourage proper posture and seat belt positioning.    
• SpaceSaver™ Design: 17.1” seat leaves plenty of room for siblings & carpoolers! This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.     
• Lightweight & Portable: Thanks to the built-in carry handle and lightweight design, you can take this booster anywhere. Weighing under 4 lbs, it’s easy for both caregivers and kids to carry.  
• Removable SafeWash® Cover: Safe to machine wash and dry. 
• Naturally Flame-Retardant Fabrics: No added FR chemicals. 
• Designed for Comfort: Kids can enjoy every ride thanks to the contoured seat with breathable foam and soft padding. Plus, the large, padded armrests provide that extra boost of comfort.  
• 2 Dishwasher-Safe Cup Holders: Keep drinks and snacks within reach; easy to remove for cleaning between rides.   
• Padded Carry Handle Cover: Helps ensure a comfortable grip.    
• Color-Coded Belt Guides: Help kids learn how to buckle up safely.    
• Shoulder Belt Guide: Helps keep the shoulder belt in the correct position, encouraging proper fitment as your big kid continues to grow. 
• Soft & Smooth Knit Fabric: For comfort and a sleek appearance.  

Specifications

• Dimensions: 9"H x 15.5"D x 17.1"W
• Product weight: 3.1 lbs.