for children 22-120 lbs. / 2 - 12 years

SafeMax™ 3-in-1 Combination Booster Car Seat (Crimson)


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Evenflo continues to redefine industry standards with the new rollover tested SafeMax™ 3- in-1 Combination Seat. The SafeMax 3-in-1 Combination Seat allows your family to travel with peace of mind and provides extended safety allowing you to transition the seat between 3 different modes of use. This seat can be used as a harness booster, high back booster, & a no back booster.

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Trusted by Millions of Families for Nearly a Century

Made in USA with US & Global Components

Peace of Mind:

Expiration: 8 years

Warranty: 90 days

Returns: 30 days


Installation Manuals: Browse »

FREE Video Support: Book Now »

Why You’ll Love it

Providing superior protection where your child needs it most, the SafeMax 3-in-1 combination seat includes a SafeZone™ headrest designed to dissipate crash forces. The integrated steel frame provides added strength while the moisture-wicking fabrics keep your child cool and comfy. The SafeMax 3-in-1 seat has three forward-facing modes that will accomodate your child through their booster-seat years. As a harness, highback, and a no-back booster, parents with older kids have a one-seat-fits-all booster seat solution. All SafeMax car seats have been tested above and beyond industry standards and undergo Evenflo's rigorous dynamic rollover test. Additionally, SafeMax car seats include Parentlink Premier service perks like an extended warranty, and free live video installation support.

Product Details

Child Specs (22-120lbs)


  • Weight: 22 - 65 lbs. (10 - 29.4 kg.)
  • Height: 28 - 50 in. (71–127 cm.)
  • Age: The child is one year old or older
  • Fit: The tops of child’s ears are at (or below) the top of the child restraint headrest.


  • Weight: 40 - 120 lbs. (18 - 54.4 kg.)
  • Height: 44 - 57 in. (112–145 cm.)
  • Age: combination-sb-age
  • Fit: combination-sb-fit


  • Weight: 40 - 120 lbs. (18 - 54.4 kg.)
  • Height: 44 - 57 in. (112 - 145 cm.)
  • Age: At least four years old
  • Fit: Ears below the top of the vehicle seat headrest.

Product & Shipping Specs

  • Package Width: 20
  • Package Weight: 24
  • Package Depth: 20
  • Package Height: 29


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
  • Certified For Use In Aircraft: When used with the internal 5-point harness this restraint meets FAA Inversion requirements for airplane use.
  • 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.

Evenflo SafeMax™ 3-in-1 Combination Seat Product Tour

Evenflo continues to redefine industry standards with the new rollover tested SafeMax™ 3-in-1 Combination Seat (22-120 lbs). The SafeMax 3-in-1 Combination Seat provides extended use, allowing you to transition between 3 different modes of seating: Harnessed Booster (22-65 lbs), Belt-Positioning Booster (40-120 lbs) & No-Back Booster (40-120 lbs). Because the brands most tested, are the ones most trusted.
SafeMax™ 3-in-1 Combination Booster Car Seat (Crimson) is rated 4.7 out of 5 by 15.
Rated 3 out of 5 by from Just not what I expected I don’t like the extra stuff in seat. Gets in the way. Hard to buckle. He hates it.
Date published: 2019-08-21
Rated 5 out of 5 by from Relief in knowing my baby is safe I have been using this seat for my little one for 4 months now. I am in absolute astonishment at the relief I get knowing he is as safe as he can possibly be in my mind. I didn’t understand the impact of knowing your baby is safe until I rounded a corner the other day, and there was an obstacle in the road. My car swayed from side to side. I was petrified. The first thought that came to my mind was, my baby is safe, now to handle this situation. Everything turned out fine, and we carried on with our day. This is a well made product and comes with piece of mind, which is a great feeling.
Date published: 2019-07-10
Rated 5 out of 5 by from best carseat I have EVER had! I purchased this car seat last year but, I would have to say this is one of the best car seat's I have EVER bought. Very easy to clean. comfortable for my daughter and the two cup holders help ALOT!
Date published: 2019-05-25
Rated 5 out of 5 by from Safe and comfortable We have this seat for our 2 year old. This seat is safe and keeps him snug in his carseat. It is very comfortable for him. Almost every road trip we take he will fall asleep immediately in this carseat. It is a bit bulky but I am still able to fit my other 2 carseats in my toyota camry. He loves the double cup holder because he keeps his juice in one and a toy in the other! I love that this carseat will grow with my child and eventually be a booster seat for him. The padding in the seat is thick and the material covering it is very soft. As a mom of 3 little ones I highly reccomend this seat for safety and comfort!
Date published: 2019-04-18
Rated 5 out of 5 by from Off road family approved My son loves off roading, we did a lot of research and common sense lead us to this carseat. We use this in our jeep only, which only gets used for off roading. Well unfortunately we had to test this carseat out the hard way after miss caculating lead to rolling our jeep. Not only was my son safe as can be after the jeep stopped rolling. He was laughing away. Thank you evenflo we have used your carseat since birth for him and will continue to do so!!
Date published: 2018-10-11
Rated 5 out of 5 by from Saved my daughters life! Last year (2016) when this car seat became available in Canada we bought it right away because of the safety features (roll over tested). On July 16, 2016, we had a major accident and rolled 7 times. My daughter was with us in her Safemax carseat. She came out with not one scratch. The car seat saved her live. I am so greatful to evenflo for making this car seat and saving my daughter who at the time was 8 months old. I encourage anyone and everyone to get this car seat. You never know when an accident can happen. Thank you evenflo for everything. I can not give enough stars of rating for this.
Date published: 2017-03-27
Rated 4 out of 5 by from Comfortable but bulky My daughter was very comfortable in the seat, with the exception of the oversized side impact cushions. While it gives me great peace of mind that she is protected, she was rather upset that she could not see to the side. These cushions are much bulkier than our previous car seats. I also feel as though the latch system could have been upgraded in the car seat. I prefer the quick release attachments as I take my car seats in and out of my vehicle frequently. Overall I would recommend the seat for its comfort and safety features.
Date published: 2016-06-23
Rated 5 out of 5 by from Wonderful Seat! I cannot say enough good things about this seat. The seat is very well padded and roomy, making it incredibly comfortable for my son and the two cup holders are very handy. The straps and buckle are easy to adjust to ensure proper placement and the seat itself is very easy to install correctly. I feel as if my son is well restrained and very safe with this seat.
Date published: 2016-06-21
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