ITEM# 12-4010028

Cybex Aton 2 Infant Car Seat 2013 Rocky Mountain

This item is discontinued.
Cybex Aton 2 Extra Car Seat Base
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Car seat includes base.


The new Aton 2 brings two new safety innovations to the U.S. market.

Adjustable Load Leg

The Load Leg, a virtual standard in Europe, is now available on the Base 2. The Load Leg provides additional support between the child restraint and the vehicle, allowing the Aton 2 to more effectively absorb and distribute crash energy.

The Leg dramatically reduces forward pitching of the seat, keeping the child in the prescribed position during the entire crash event. This reduces the risk of spinal cord injury due to stretching, which can be caused if the infant seat pitches too far forward.

Linear Side Impact Protection (LSP)

The LSP side protectors on the Aton 2 transfer the initial impact of a side impact to the seat's shell.

The optimized structure of the shell absorbs the forces and channels them away from your baby resulting in a 40% increase in safety.

World Class Safety

  • Excellent Side Impact Protection: The LSP devices in combination with the flexible, energy absorbing shell, thick EPS foam, and extra thick padded covers, absorb and distribute crash forces away from your child especially during side-impact collisions.
  • Dual Weight Ranges: The Aton 2 offers dual weight ranges to help make sure your seat is reclined at the proper angle according to the weight of your child. One range accommodates children from 4?22 pounds and the other, 22?35 pounds.
  • European Install: When installing the Aton without the Base, a front mounted belt guide allows the preferred ""European"" method where the shoulder belt wraps around the front of the carrier adding additional stability.
  • A Steel Chassis: A solid steel spine running through the Aton 2 Base creates metal to metal contact through the Load Leg, infant carrier, and the vehicle for added strength and properly managed crash forces.
  • Dual Action Release: A green safety button indicates a secure connection has been made between the carrier and the Base. This button is part of a two-step process needed to remove the Carrier from the Base, preventing accidental release.
  • Certified: All CYBEX seats meet and exceed FMVSS 213 Standards and are approved by the FAA for air travel.
  • Latest Safety Technologies: The seats are outfitted with the latest safety equipment including an extra wide five-point harness, padded shoulder and buckle belts, premium LATCH connectors, and anti-rebound protection.


Whether you use LATCH or vehicle belts, the Aton 2 Base is truly easy to use.

  • Innovative Belt Tensioner: The Aton 2 Base uses a unique Belt Tensioning Plate for a quick, simple and secure installation when using either LATCH or vehicle belts. Simply remove the slack from the belts and close the plate for a super easy and tight install.
  • Recline Foot: A four-position, spring activated leveling foot makes reclining the Aton 2 easy. The dual ranges level indicator makes sure your child is reclined at the proper angle.
  • Adjustable Load Leg Foot: The foot of the Load Leg adjusts from 10¾ to 18¾ inches to allow firm contact between the foot of the Load Leg and the vehicle floor.
  • Premium Latch Connectors: We use only premium LATCH Connectors on our Base, making for a quick and easy installation. LATCH Connectors can be stored in the Base for out of the way storage when not in use.
  • Free Latch Guides: LATCH Guides easily hook onto your vehicle's lower LATCH anchors to help make car seat installation easier while at the same time protecting your vehicle seats. Keep a pair in each car for easy transfer of car seats between vehicles.

Not compatible with hook-type Lower LATCH Connectors.


CYBEX cars seats offer your baby a plush, comfortable environment, while making it easier on you to use them everyday.

  • Ultra Light Carrier: Weighing just under 9 pounds, the CYBEX Aton 2 Infant Carrier is one of the lightest carriers on the market due to the careful consideration of materials as well as having the release mechanism as part of the Base and not the Carrier.
  • Integrated Canopy: The unique integrated fold-away canopy provides SPF 50+ sun protection for your child while maintaining the sleek style of the Aton 2.
  • Three Position Handle: A three position handle accomodates carrying and driving, resting, and storage when needed.
  • Premium Fabrics: Super soft, extra padded covers complete with shoulder and buckle pads comfort your child while in the Aton 2.
  • Infant Insert: Provides more stability to the head and upper torso and also aids in providing a better fit of the harness with smaller children.
  • Newborn Inlay: Properly positions smaller babies for a better fit of the harness and also opens up the torso angle to help facilitate breathing and digestion.
  • Travel System: The CYBEX Aton 2 can be paired with any CYBEX stroller for an ultra chic urban travel system.


  • Seat Type: Rear Facing Infant
  • Child Weight: 4 to 35 lbs
  • Child Height: 30 inches or less
Infant Carrier Carrier On Base
Max Width 17.25 17.25
Seat Height/Top of Handle 15.25/21 17/24
Length 25 26
Load Leg Length - Min: 10.75 / Max: 18.75
Shoulder Width 10 10
Harness Slot Heights 7,9,10.5 (Without Insert: 8,10,11.5) -
Weight 9 21.2
Product Reviews
out of 5.0
22 Reviews
Ratings Snapshot
of Reviewers
Verified Buyer
Safe and affordable
February 29, 2024
Love Cybex and love this seat!
  • Seat is sleek and lightweight
  • Base is tricky to install
Verified Buyer
Best prices on Albeebaby
November 18, 2023
Such a nice car seat! Very happy we purchased. Price was amazing on albeebaby!
Verified Buyer
May 7, 2023
Love cybex! All very lightweight and super cute
Brooklyn, NY
Verified Buyer
Great car seat
June 28, 2021
Serves its purpose. Easy to use, and fits in our Jetta with room to spare. Everything is washable, thank goodness (carsick baby). Lightweight too, relatively speaking. Canopy does stink.
  • Lightweight, leaves ample leg room for seat in front
Best Uses
  • Smaller cars
  • Canopy is not helpful
Long Beach , CA
Verified Buyer
Easy to install
May 12, 2020
Safe, comfortable, and easy to install.
Butler, pa
Verified Buyer
Nice car seat for the money
March 8, 2020
Only complaint is the belt is hard to adjust
Georgetown, Kentucky
Verified Buyer
So far I love it
October 28, 2019
We had an uppababy Mesa with our previous baby, and loved it. However, the fabric was hot and the weight of the car seat was very heavy. This time, we chose the cybex Aton 2 as it seemed to specifically address our previous concerns. The fabric is very nice, we love the color schemes available and the weight of this fantastic! We are also intrigued by the stabilization leg. All in all, it appears to be a great infant carrier. We purchased the adapters to use with the Uppababy cruz but we do not like the angle the seat rests on the stroller so we are probably going to have to buy a new stroller. The adapter options are as plenty with the Cybex models. Also, the release on the Cybex isn't as well thought out as the uppababy. But overall we like it.
  • light weight, great safety rating, added leg on base, fabric is lovely.
  • not as many adapter options to combine with strollers- we are kind stuck with buying a new stroller. The release on the carrier is more complicated than the one button uppababy but we'll get used to it.
Marina del Rey, California
Verified Buyer
Great car seat, but sun visor is pretty small
September 13, 2017
This car seat is super lightweight, sturdy and the padding is sooo soft and cozy. My only complaint is that the sun visor is pretty ineffective since it's pretty small.
Woodbury Minnesota
Verified Buyer
July 2, 2017
I absolutely love this seat it is lightweight and beautiful.
  • Lightweight
  • Beautiful colors
  • Looks comfortable
  • Base heavy but I don't carry that around so it's okay
Rosa D.
New York City, NY
Verified Buyer
November 15, 2015
We haven't used it yet but just looking at it makes us want to rush the baby out to put it to use. It's a beautiful car seat. The colors are bright happy colors. The fabric is very soft to the touch. Very beautiful, I love it!
  • It's beautiful, light weight and easy to use.
Best Uses
  • Great car seat to hang around in from car to any room in the house. Very light so you'll love it.
  • I have nothing bad to say about it. Unless your looking at the price. It's expensive for a car seat but we're very happy.
Steamboat Springs, CO
Verified Buyer
Great Product
October 29, 2015
We just purchased this for our baby. She isn't due for a few more weeks, but we were quite diligent in searching for a safe and lightweight option. This seems to be the perfect match. Good quality and striking colors.
Verified Buyer
Fantastic compact car seat..
July 11, 2015
We love the superior safety features and ratings on this car seat. Having twins and a small car, we needed a compact seat, one that fitted safely, most securely and also could accommodate preemies through to older infants, this was the one!
  • Highest safety ratings
  • Ease of fitting and removing seats, easy adapter to stroller
  • Compact
  • Soft, and comfortable for babies
Best Uses
  • Fits Preemie babies well and adapts for infants...Great for compact cars too!
  • As others have mentioned before, the canopy is very short, if this came with the Nuna Pipa style extended sun canopy it would be an all round winner!
Valencia, CA
Verified Buyer
Light and compact
July 1, 2015
We were looking for a smaller infant car seat for our second child. Our car has a small backseat but we didn't want to trade it in so we tried this seat since it's supposed to be one of the smallest. Fits nicely, is lightweight and I like that it comes in different colors. Works within a Maxi Cosi adapter for our Uppababy stroller. I wish the sun shade came down a little further but that our only complaint. Very happy with our purchase!
New York, NY
Verified Buyer
Nice car seat
June 24, 2015
Easy to install, pretty light, overall happy with purchase
brooke R.
Austin Tx
Verified Buyer
great car seat and seams very safe
August 2, 2014
I love the car seat . I just can't find a stroller at a reasonable price that will work with it.
Jessica K.
Verified Buyer
July 31, 2014
I was rear-ended recently and decided to replace a Britax B-Safe with the Cybex Aton 2 as I wanted a more compact seat and appreciate its safety feature such load leg and LSP. It's installed behind the driver and the driver's seat can be pushed back all the way if needed. The one down side to the Aton 2 is that the canopy is small but I knew that before I decided to purchase
Laredo, Texas.
Verified Buyer
Best Car Seat Ever
July 3, 2014
For me, this is the best car seat ever, im impress with the security system they handle, better than the latch.
J&Es M.
Verified Buyer
Easy to use, great value
March 24, 2014
Not a huge fan of the color but wanted to get the same brand and model for our boy/girl twins but in different colors - the blue is fabulous! We occasionally take taxis and it's easy to use, safe and secure. We also use them regularly with our stroller, Baby Jogger City Select (requires attachment), as it's super cozy for our tiny babies with extra padding and easy to remove and carry them in the seats if necessary, like at doctors appointments.
Orange, Tx
Verified Buyer
Great Seat!
February 17, 2014
Very light weight and fits much better in my Tahoe than the others I tried. It is well made and easier to carry.
Laredo, Texas
Verified Buyer
Cybex Aton 2
January 29, 2014
Another experience, love this car seat, so different than the others, i really recommed, albeebaby buyers "you need to have one" EXCELLENT! A+++
Atlanta, Georgia
Simple to use, Lightweight, fits well in smaller cars
January 17, 2014
We bought this seat to fit in a Scion tC and Lexus IS knowing they both have small backseats. The Aton 2 fits in the rear installed on the base with plenty of room for a passenger to sit in the front seat, and the simple system for using the seat without the base in any vehicle made in the last 25 years means you never have to worry about taxis, rides from neighbors, and best of all, use on aircraft. Install using LATCH is dead simple, and the guides are explicit so getting it in the car correctly is a piece of cake. I would highly recommend this seat and base to anyone with a small back seat who wants to leave room for a passenger in the front.
  • Works in almost any vehicle. LATCH connection for the base makes the install dead simple
Best Uses
  • With the base installed. Too easy to get in and out without drama.
  • Tightening the belts can be difficult because of the routing of the strap. Latches for the harness can rotate easily on the belts, so knowing to fold the belt over and slide the latch to put it right is important.
Pittsburgh, PA
Verified Buyer
Best car seat
April 5, 2013
Best infant car seat after tons of research
  • Safe
  • Lightweight
  • Super easy install
  • Great color choices
  • Expensive
Customer Q&A