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Britax Frontier 85 Combination Booster Car Seat, Rushmore (Prior Model)

4.6 out of 5 stars 414 customer reviews
| 3 answered questions

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About the Product
  • Highest 5 point harness seat capacity allows your child to remain harnessed up to 85 pounds or in booster mode to 120 pounds
  • True side impact protection distributes crash forces, shields from vehicle intrusion, contains the head and body and keeps the head, neck and spine "in true" or aligned, to limit injury
  • Patented versa-tether introduces a staged-release tether webbing that anchors the top of the child seat at two points to minimize forward movement in a crash
  • Quick-adjust head restraint and no-rethread harness easily adjust the harness shoulder height and head restraint without disassembling the harness
  • Ships in Certified Frustration-Free Packaging
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Product Description

Product Description

The highest-capacity five-point harness seat you can find! Britax has redesigned its best-selling Frontier booster to hold even taller, bigger kids - up to 85 lbs. in 5-point harness mode and 120 lbs. in belt-positioning booster mode. Its 10-position harness adjusts up to 20"H, the highest height ever, protecting kids as tall as 5'5". This is big news, because the longer your child stays in a booster, the safer he will be. In addition, the Frontier incorporates Britax' many breakthrough safety technologies, including True Side Impact Protection™, Versa-Tether(R), HUGS™, and more. Very roomy and plush, with comfort foam, armrests, and cup holders, so kids enjoy the ride. An outstanding choice for ages 2 years and up. Made in USA. Britax designed Frontier 85 to be the safest, high-capacity booster seat in the industry Britax' True Side Impact Protection™ distributes crash forces upon impact, keeps kids contained, and keeps the head, neck, and spine properly aligned Britax' patented Versa-Tether(R) anchors the top of the seat at two points to minimize forward movement in a crash The energy-absorbing base "deforms" in a crash, working like crumple zones in an automobile to absorb impact Britax' Harness Ultra-Guard System (HUG™) reduces forward head movement in event of impact The 5-point harness offers 10 positions and adjusts from 12"-20"H, the highest in the industry. No re-threading necessary; headrest adjusts with one hand. Easy to install, with accessible, color-coded belt paths and push-button lower LATCH connectors Built for comfort, with plush cover, high-density padded foam, and armrests with dual cup holders In forward-facing car seat mode, the Britax Frontier 85 supports kids age 2 and up, from 25-85 lbs. and 30"-57" tall. Seated shoulder height should measure 12"-20"H. In belt-positioning booster mode, the Britax Frontier 85 supports kids 40-120 lbs. and 42"-65" tall. Seated shoulder height should measure 13 1/2"-24 1/2"H.

Featuring an innovative design and industry-leading technology, the Britax Frontier 85 Combination Booster Seat (Rushmore) keeps your child safe and secure during car trips. Offering True Side Impact Protection and a patented, energy-absorbing Versa-Tether, this seat is engineered to grow with you child. The Frontier 85 accommodates children starting at 2 years old and 25 pounds up to 85 pounds when used as a forward-facing harnessed seat, and 40 to 120 pounds when used as a booster seat.

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The Frontier 85
Combination Booster Car Seat
At a Glance:
  • Age/Weight/Height Requirements:
    In forward-facing harnessed mode, fits children 2+ years old weighing 25 - 85 pounds; In booster mode, fits children measuring 42 - 65 inches and weighing 40 - 120 pounds
  • Warranty:
    Limited 1-year warranty
  • Certifications:
    Certified for aircraft travel in harness mode only
Ideal for:
  • Who:
    Parents of growing children, caregivers, grandparents
  • What:
    Providing a secure, comfortable combination booster seat that offers innovative safety features and highest harness capacity
  • Where:
    Mid-sized cars, minivans, SUVs
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Frontier 85 Combination Booster Car Seat
The high weight capacity allows your child to remain in a 5-point harness up to 85 pounds, or in booster mode to 120 pounds. View larger.
Frontier 85 Combination Booster Car Seat
When used in booster mode, the Frontier 85 is compatible with the Britax SecureGuard Clip (sold separately). View larger.
Color combinations

Available in these color combinations.
View larger.
True Side Impact Protection for Advanced Security
The Frontier 85 Combination Booster Seat is ideal for parents concerned with providing proper safety and posture-support for their children during car rides. Offering True Side Impact Protection, this seat delivers superior protection if you happen to face an unexpected side-impact accident.

If such an event takes place, the solid head support and deep side walls work efficiently to distribute forces, shield the child from vehicle intrusion, contain the head and body, and keep the head, neck, and spine aligned to limit injury.

Superior 360-Degree Protection Features
The Frontier 85 features an advanced, industry-leading design for crash force management and absorption. The patented Versa-Tether system provides a staged-release tether webbing that securely anchors the top of the child seat to your vehicle at two points to minimize forward movement in the event of a sudden stop.

The energy-absorbing base is designed to absorb impact forces, while the foam lining provides additional support. In addition, the Harness Ultra Guard System (HUGS) reduces forward head movement and offers increased protection for your child.

The Frontier 85 is also compatible with the SecureGuard feature. The optional SecureGuard clip holds the lap portion of the safety belt in place, preventing submarining--when the child slides under the lap belt--and reducing the risk of any abdominal injury.

Adaptable to Your Growing Child
The tangle-free, five-point harness allows for 10 harness-height positions--up to an industry-leading 20 inches in shoulder harness height--and three buckle positions for a snug, comfortable fit, even as your child grows. You can also adjust the head restraint with one hand using the quick-adjust lever and easily change the harness shoulder height without disassembling the entire harness. Plus, the convenient front harness adjuster allows you to loosen or tighten the harness system easily.

The booster seat can be used in the forward-facing harnessed position for children a minimum of two years old, weighing 25 to 85 pounds, the highest capacity in five-point harness systems. As a belt-positioning booster seat, the seat is suited for children from 40 to 120 pounds.

The Frontier 85 allows for quick, easy installation with lower LATCH connectors, compatible with most current vehicles. The premium, push-button system provides a tight, secure fit and makes it simple to install or remove the seat.Your child will appreciate the armrests that provide a natural place to rest his or her arms along with the dual cup holders designed to hold reusable water bottles or snack containers.

Soft, Durable Material with Comfort Foam
The plush, premium cover set with underlying comfort foam makes for a comfortable ride, even during long car trips.

Made from soft, durable materials, the booster seat's cover is easy to remove from the shell for cleaning and is available in a selection of distinctive patterns, including Rushmore, Red Rock, Canyon, and Pink Sky.

This combination booster seat is backed by a limited one-year warranty.

What's in the Box
One Britax Frontier 85 Combination Booster Seat and manual.

Frontier 85 Combination Booster Seat

Product Information

Technical Details
Item Weight19.6 pounds
Product Dimensions27 x 19.5 x 23 inches
Item model numberE9LC2H6
Minimum weight recommendation25 Pounds
Maximum weight recommendation120 Pounds
Additional product featuresWashable FabricCup HolderWashable FabricCup Holder
Number of items1
Specification metcertified frustration-free
OrientationForward Facing
Harness type5 pt
Additional Information
Best Sellers Rank #47,918 in Baby (See top 100)
Shipping Weight23.6 pounds
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Shipping Advisory:This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
Warranty & Support

Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Don't even blink at the price or anything else that really doesn't matter in the grand scheme of life. We were in a freeway rollover accident yesterday in our Honda Pilot that completely totalled the car. My precious 4 year old daughter was all strapped in tight in this carseat and walked away without even a scratch. As soon as I finish up this review, I am buying another one. Seriously, when you are in an accident like that, won't you be glad you put your munchkin in the safest seat possible, even if it can be a pain in the neck to install and annoying to get the cover off to clean? Also should note my 22 month old son was in an Evenflo Triumph (also gets high safety ratings). Thank God he was totally fine, but the strap that attaches the carseat to the anchor in the car literally ripped in half horizontally. It is a miracle that he is okay, because I shudder to think he could have been flopping around with only one anchor attached in addition to the over the seat tether...
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I own a Britax Marathon which I still use for my younger child, and had purchased the Britax Frontier 85 as a long term seat for my oldest child, currently 3 years old. Occasionally I need to remove the car seats and install in another vehicle. The Marathon can be done with ease. The Frontier, is the most frustrating installation I have ever experienced. I believe it is due to a cheaper design. The Marathon offers 2 independent straps for the latch system. Each is pulled individually for a taught fit. The Frontier however, only offers 1 pull strap for both latches. This may have saved $10 in design and construction costs per unit, but for the customer , far more a struggle than the Marathon design.

What makes it difficult is how incredibly easy it is for the strap to become twisted and tangled in an area behind the seat which you have no visual nor access to. I have read some of the positive reviews here and one individual was questioning intelligence for those that are having difficulty with the installation. I am a technical engineer by day with a master's degree, and can assure you, I am not lacking intelligence. I am also a volunteer firefighter, and have knowledge and experience on how to install, uninstall and in emergency situations, cut these seats in half.

Their customer service is what may save them from losing me as a customer. The representative acknowledged that if you pull taught when the strap is in a twisted state, that could cause it to want to twist during successive pulls. They are sending me a new set of straps to try. Ultimately I'd rather see an independent 2 strap design like the Marathon.
28 Comments 263 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Verified Purchase
I was debating and debating for MONTHS on which car seat to choose...the britax or the graco 3 in 1 natalius. I narrowed these 2 seats because they both get awesome reviews for safety. We have britax (roundabout and marathon) so I was already familiar with this great product. I love the frontier and I am so glad that I made this choice! I know that britax is #1 in safety and they are well built...that was not my concern. My main concern was comfort. I wanted to be able to go on car rides (long trips) and rest easily knowing that my boys would nap great in the car...without their heads slumping forward! Nothing drives me crazy like that does......they do not nap well and I can not concentrate knowing their poor little necks are being tossed all over the place. We have been in town and they have fallen asleep with no head slump at all. I am very happy with this pruchase.
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I bought this seat a few months ago, managed to get it installed and everything was fine. Until my daughter threw up in it. It says do not machine wash. Are they INSANE??? After I struggled to get the cover off, I washed it in the sink 3 times with detergent and once with spray and wash, resorting to scrubbing with a toothbrush in the crevices. It still stank. I HAD to put it in the washing machine, it still smells bad, so it's in there again right now. Also, the top section of the cover does not come off, I wiped it down thoroughly, it still reeks. And how on earth do you clean the foam pad underneath the seat? The straps I managed to clean by dunking them in a bucket and using a toothbrush to scrub them. Luckily I still had her old car seat so I have been able to use that for now while I figure out this mess. I really don't have the money to waste on an expensive car seat that can't get washed well. Kids throw up Britax! How realistic is it to have a booster seat that is supposed to last for several years and not expect some poor parent to have to deal with cleaning puke out of the horrendous thing?
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Automobiles are not built to protect small passengers in a crash - even small adults! If you want to increase the odds your child will survive a collision, I recommend keeping him or her in a booster seat as long as you are able to do so. The Britax Frontier 85 is more than just a booster - it is a booster with a top tether which significantly increases the safety of the seat. A 5-point harness is safer than the seat belt, and that's how my petite 9-year-old rides. The law says 8 or 80 but I feel that law should be more stringent. I plan to keep my daughter in the harness until she reaches 85 pounds and the belt-positioning booster until she is 12 or older. I have taught her that safety is more important than "image" - I don't care that all of her friends are allowed to ride in cars with no booster of any kind. The vehicle's seats and belts are NOT designed to protect your small riders. I'll say it again - a Britax Frontier 85 is well engineered to increase small riders' odds of survival in a collision.
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