for children 40-110 lbs. / at least 4 years old

Spectrum Belt-Positioning Booster Car Seat




The Evenflo® Spectrum™ Booster Seat offers a 2-in-1 design that transitions from a high-back booster seat to a no-back booster seat supporting your child from 40-110 lbs. 

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Trusted by Millions of Families for Nearly a Century

Made in USA with US & Global Components

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Warranty: 90 days

Returns: 30 days


Installation Manuals: Browse »

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Why You’ll Love it


Spectrum booster seats come equipped with advanced compression technology called Lyf+Guard. Lyf+Guard is made up of multiple layers of energy-absorbing materials designed to compress upon impact, helping to lower the risk of injury. Additionally the Spectrum boasts stylish and ergonomic armrests and and a removable back to fit children as they grow.

Product Details

Child Specs (40-110lbs)


  • Weight: 40 – 110 lbs (18 – 49.8 kg)
  • Height: 44 – 57 inches (112 – 145 cm)
  • Age: Child is at least four years old.
  • Fit: The tops of the child’s ears are below the top of the child restraint headrest.


  • Weight: 40 – 110 lbs (18 – 49.8 kg)
  • Height: 44 – 57 inches (112 – 145 cm)
  • Age: Child is at least four years old.
  • Fit: The tops of the child’s ears are at or below the top of the vehicle seat headrest.

Product & Shipping Specs

  • Dimensions: 16.5 W x 27.5 H x 16 D (inches)
  • Package Width: 20.5 in.
  • Package Weight: 13.6 lbs.
  • Package Depth: 13 in.
  • Package Height: 25.125 in.


Safety Testing

At Evenflo, we continue to go above and beyond government standards to provide car seats that are tested at 2X the Federal Crash Test Standard.

  • Side Impact Tested: Meets or exceeds all applicable federal safety standards and Evenflo’s side impact standards.
  • Designed and tested for structural integrity at energy levels approximately 2X the federal crash test standard.
  • FMVSS 213: Federal Motor Vehicle Safety Standards for Child Restraint Systems
  • FMVSS 302: Federal Motor Vehicle Safety Standards for Flammability of Interior Materials
  • CMVSS 302: Canada Motor Vehicle Safety Standard
  • CMVSS 213: Canada Motor Vehicle Safety Standard
  • Evenflo Temperature Testing: All current Evenflo car seats are tested for product integrity at both high and low temperatures.

Use & Care

Use & Care

Read all instructions and warnings on the product, product labels, and instruction manuals before use. Consult your vehicle owner’s manual to determine proper placement of child restraint in your vehicle and familiarize yourself with your vehicle’s components.

Browse Instruction Manuals »

Cleaning Instructions
  • DO NOT lubricate or immerse in water any part of this child restraint, unless rinsing is permitted
  • Plastic and metal parts may be wiped clean with mild soap and water and dried with a soft cloth. Do not use abrasive cleaners or solvents.
  • Take care not to damage any labels.
  • The harness can be wiped clean with mild soap and water. Allow harness to air dry.
  • Machine wash the seat pad separately in cold water, delicate cycle. Tumble dry 10 to 15 minutes on low heat.
  • Periodically inspect and clean the restraint's crotch buckle of food, liquids, and other debris to ensure proper latching. Place the buckle in a cup of warm water and gently agitate the buckle back and forth. Press the red button several times while the buckle is in the water. Do not submerge the harness strap. To avoid damage to the buckle, do not clean the buckle with soap or detergents and do not use a lubricant.
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Spectrum Belt-Positioning Booster Car Seat is rated 4.5 out of 5 by 51.
Rated 5 out of 5 by from Easy to install, super comfy I put the booster seat together and had it installed in the car in under 10 minutes while the kiddos played with chalk in the driveway. I’m a big fan of the storage/cup holder compartments on the side and the high armrests. I feel like the high armrests help keep the lap belt in good position and prevents our daughter from leaning over too much to the side. The shoulder belt positioner isn’t visible, as it is covered by the headrest. That made it a little trickier to loop the belt through, but didn’t take too much longer. Our 4-year-old says she likes it and it’s very soft! And if you’re looking for a seat to match your car’s interior, this is the one for you.
Date published: 2018-02-22
Rated 4 out of 5 by from Easy and effortless The booster arrived in a small box, this kind of confused me because I was expecting a big car seat box that takes up my entire front porch, but the package arrived in a slick box with three large sections of the seat nestled inside. The seat was very easy to assemble; clicking the head section, back section, and bottom section together in a flash. It’s pretty lightweight compared to my son’s old booster seat. My son is seven years old and pretty tall, but this seat extends to meet his height and then some. When I asked my son his thoughts he said “I really like it.” Also, I will note that while driving with it empty it does not make any rattle noises. My only complaint is that the head piece is pretty bulky.
Date published: 2017-12-29
Rated 5 out of 5 by from We love the Spectrum high back booster!!! We received our Evenflo Sprectrum high-back booster to test a little over a week ago. My 11 year old daughter does not meet our state’s height and weight requirements to us me a seat belt only. She LOVES this seat. She loves how comfortable it is and especially loves the cup holders. We are using the back with her at hart request and I am very impressed with the cushion in the head support. It fits well in the bucket seat of my minivan, but due to height we use it in the very back seat. My 9 year old is disappointed because she can not comfortably sit in the seat due to the narrowness of the sides of the seat and her wide hands hips
Date published: 2018-02-20
Rated 5 out of 5 by from Great Booster Seat I received the 2 in 1 Spectrum Belt-positioning booster car seat about three weeks ago. It was super easy to assemble. I'm impressed with the safety technology the LYF +Guard Advanced Compression Technology system gives me peace of mind knowing that my grand children will have extra protection in case there ever is an accident. The height adjustable back rest is great because I have three grand children ages 13 months 3 and 4 years old. The wide comfortable seat is a plus. My grand children love the two side storage cups for holding snacks and a drinking cup. The best advantage is that they love that fact that they can see very well out the car window.
Date published: 2017-12-26
Rated 5 out of 5 by from I bought this carseat after spending a few 100 of $ for both my children. They refused to use those car seats and one day I came across this Evenflo Spectrum Carseat. They loved it! They are spacious and comfortable when they fall asleep. Keeps their heads and body at great position as they sleep. Unlike the originals I first bought they're bodies would hang off to the sides not at all safe. I'm even saving to purchase two more and have their father have this carseat in his car to keep our children safe. I have a few friends that are expecting and tell them to get this specific carseat. Recommend it for any child especially if your child is big and tall . My children are taller than most kids their age.
Date published: 2017-07-07
Rated 5 out of 5 by from Great booster for 8 year old in California This booster is one if not the only best booster car seat that my daughter has used. It is compact in size (doesn't take up too much space). It helps position the seat belt perfectly. In CA we must keep our children in boosters until 10 years old and this seat will easily last the years I will need it. My daughter said she loved the impact boarders (near the head) because it helped her while she slept. I noticed she didn't fall to the side like she did with her normal boosters (no back). Overall this is a great booster seat and I recommend it to all parents of children who can no longer use 5 point harness car seats.
Date published: 2018-03-18
Rated 4 out of 5 by from Comfy booster! We received the Spectrum Belt-Positioning Booster Car seat ( Cornerstone) free to review. I love the 3 tone color on this particular color. I have a JEEP Commander and the 2nd row is stadium seating and i was considering getting a mini van which is not me at all but our other carseat (Evenflo SafeMax All-In-One carseat) which i love and and own 2 makes it harder to get my 4 year old toddler in and out of my JEEP BUT not only the Spectrum was a breeze to install, it was so easy for my little one to hop into his seat and i just have to reached over and buckled him. I'm happy with my new Spectrum Booster and no intention to switch to a minivan. One happy mama!!! Thank you Evenflo!
Date published: 2018-02-22
Rated 1 out of 5 by from Car seat guide prevents seat belt from retracting. The car seat guide holds the seatbelt in a way that doesn't allow the belt to retract.
Date published: 2017-09-23
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