mifold Review

mifold -- the solution for carpools?

mifold — the solution for carpools?

If you’re on any social media outlets, you’ve probably seen an ad or ten for the mifold. We sure have! We’ve been anxiously awaiting its release. Unlike most products, the mifold got its start with an Indiegogo campaign so the manufacturer was taking orders for it long before its release to market.

Mifold’s creator, Jon Sumroy, envisioned a product that was ultra travel-friendly.  A seat that’s small enough to fit practically anywhere so that it could always be available when needed.  The resulting booster seat is extremely compact!  Small enough to fit in a glove box, console, backpack — almost anyplace where a child might need it.



CSFTL Quick Stats




  • Extremely compact
  • Optional carry bag
  • Large variety of colors
  • Lightweight
mifold measures 9 inches across the seating area

mifold measures 9 inches across the seating area


  • Weight: 1.6 pounds
  • Width at Setting 1: approx 9 ¾”
  • Width at Setting 2: approx 12″
  • Width at Setting 3: approx 13 ¾”
  • Depth: approx 8.5″
  • Folded: approx 9.5″ wide x 4.5″ deep x 1 ¾” thick


The mifold ships pre-assembled.  To use the mifold, open it up, extend the belt guides to the appropriate setting by squeezing the red tabs on the underside of the seat, then adjust the shoulder belt positioning strap so that the clip sits approximately 1″ above the child’s shoulder.  Unlike many shoulder belt positioning straps, this one easily clips around the seat belt rather than the seat belt being threaded through the guide.



mifold Setting up

mifold Setting up

Setup is pretty straightforward.  Simply unfold the mifold, then place it against the vehicle seat bight. The seat bight is the part of the vehicle seat where the horizontal and vertical parts of the seat come together.

The mifold sits all the way back on the vehicle seat.  It’s important to ensure that the mifold doesn’t slide forward as your child sits down or buckles themselves in.

*Note: If you have a raised seat bight, the mifold will be positioned with back against the lower seat bight and not the true seat bight.

Extend the belt guides to the correct position.  According to the manual, they should be on the closest position to the child’s body without touching the child’s body.

Have the child sit centered on the mifold and route the lap portion of the vehicle seat belt through both belt guides, then buckle the seat belt.  Place the required shoulder belt positioning strap between the child’s back and the vehicle seat back, then adjust it until the guide falls approximately 1″ above the child’s shoulder. Many belt guides can be difficult to secure to the shoulder belt, but the mifold’s shoulder belt guide opens and closes like a large plastic chip bag clip so it’s fairly easy to use.

Fit to Child

5 Years Old

mifold: 5 Years old, 43 pounds, 41 inches tall

mifold: 5 Years old, 43 pounds, 41 inches tall

This model is 5 years old, weighs 43 lbs, and is 41 inches tall.  The shoulder belt fit him nicely with the seat belt adjuster strap, although it liked to slide off his shoulder, partially because he’s still a bit young and wiggly for such a low profile booster.  The lap belt, however was nowhere near his hip bones; instead it fit almost at the midpoint of his femur.  We aren’t comfortable with the seat belt riding in that position; we advocate that a better fit places the seat belt closer to the child’s hips.  Setting 1 for the lap belt guides provided a nice width for him.

8 Years Old

mifold: 8 years old, 45 lbs, 48 inches tall

mifold: 8 years old, 45 lbs, 48 inches tall

This model is is 8 years old, weighs 45 lbs, and is 48 inches tall.  He found the mifold to be pretty comfortable but there were a couple of issues with the seat belt fit.

The belt fit on him was a little closer to what we’d traditionally see with a booster, though the belt is still low across the thighs.  The biggest issue that he had was sliding forward away from the vehicle seat bight.  This caused him to slouch quite a bit.  Not only is this uncomfortable for the child, this belt fit risks internal injury.  He was unable to correct this slouch and move into a safer position.  We wonder if the slick surface of the mifold contributed to this belt fit and conversely, if a non-skid surface on the side of the mifold facing the vehicle seat could prevent it.   The mifold has a non-skid surface on the side where the child sits — perhaps having a similar surface on the back of the seat would help prevent this poor positioning.

*Note: if you have an angled seat bight, the mifold is positioned such that back of the product falls at the crease between the bottom of the raised seat bight and the vehicle seat bottom.  This may have the back of the mifold angled up slightly.

Pro Tip

On our next ride, we were extra careful to position the mifold firmly against the vehicle seat bight and asking our model to sit down more carefully.  This prevented the mifold from sliding forward.  With this method, the mifold hardly moved during the drive. What a relief!

Age 12: Model 1

mifold: 12 years old, 89 lbs, 57.5″ tall

mifold: 12 years old, 89 lbs, 57.5″ tall

Our first 12 year old model weighs 89 pounds and is 57.5″ tall.  She’s just a hair away from passing the 5-Step Test in our 2012 Honda Odyssey but her legs need to grow just a touch more so that her knees fully come to a natural bend at the edge of the vehicle seat.  Like our 8 year old model, she had an issue with the mifold sliding forward from under her — it  pushed her into a bit of a slouching position.
Pro Tip

Using the same setup method that we tried with our 8 year old model above,  where we positioned the mifold firmly against the vehicle’s seat bight and asked our model not to wiggle too much while getting into the seat, once again prevented the mifold from sliding around.

The manual states that the belt guides can not touch the child.   Even though this model is petite for her age and under the weight max of 100 pounds, she has outgrown the mifold because the belt guides were pushed against her sides.  Additionally, we had an issue with the belt guides touching the slight contours of the vehicle seat and retracting on one side, creating asymmetry in the settings (one side was on setting 3, the other side got pushed back into setting 2).  We feel that this could be prevented in future models by the settings locking into place.

With some other backless boosters, the shoulder adjuster strap is not always long enough to accommodate longer torsos.  The mifold’s is ample, and in fact could have easily accommodated a much longer torso!  She found the mifold uncomfortable, and hard to set up, largely because the belt guides fit so close to her and the seat belt was across the tops of her thighs.

Age 12: Model 2

mifold: 12 years old, 82 lbs, 5'2″ tall

mifold: 12 years old, 82 lbs, 5’2″ tall

Our next 12 year old model weighs 82 lbs and is 5’2″ tall.  She no longer needs a belt positioning device of any kind but I was curious to try her out in it since she’s built differently than our other model.

At their widest position, the belt guides were just wide enough to not be in full contact with her body.  Since she’s so tall and her knees easily come to a natural bend at the vehicle seat edge, she had no issues with slouching and her belt fit was closer to what we’d traditionally see with most boosters, though it was still a good bit lower on her upper thighs.  She said that it felt strange and was tempted to pull it higher since that’s the kind of belt fit she’s used to but otherwise, she found the mifold fairly comfortable.

Important Information: Where to Find

FAA Approval

mifold FAA label

mifold FAA label

Airplane seats have lap belts only, so the mifold, and all booster seats are not approved for use on airplanes. The mifold label specifically prohibits using it on airplanes. The label is located on the shoulder positioning strap on the label most toward the mifold seat pan.

Date of Manufacture

mifold Date of Manufacture label

mifold Date of Manufacture label

The date of manufacture sticker is located on the back of the shoulder belt positioning clip.  This seat has a 7 year expiration.

Manual Storage

mifold Manual storage

mifold Manual storage

There’s a storage compartment on the edge of the mifold, near the crease.  After reading the manual, it tucks into the slit in the plastic shell for storage.


  • Easy to adjust
  • Lightweight
  • Incredibly small


  • Unpredictable belt fit which will vary by child’s size, vehicle, and seating position
  • Too narrow to fit many children who are of an appropriate age and size for a backless booster
  • Belt guides which easily compress inward which can result in asymmetrical settings
  • Belt guides and positioning strap can be difficult for some children to adjust on their own
  • Slippery surface on the vehicle seat side can result in the mifold sliding under the child

Overall Thoughts

We commend the mifold team for creating this innovative, new, compact, lightweight, and relatively user-friendly seat belt positioner, and for getting so many people excited about a product that’s designed to make traveling safely with kids easier.  The mifold’s narrow width makes it a great option for tight three-across configurations and is available in a wide variety of vivid colors which makes even reluctant kids more excited to use it.

Unfortunately, the mifold does have several notable drawbacks and we foresee a lot of unpredictable or even improper belt fit issues with the seat.  We strongly suggest taking those issues into consideration when deciding if the mifold is right for your family.

We are hopeful that the good folks at mifold will take some of these issues into consideration and in future versions improve on this innovative seat to make the product even more versatile.

The mifold used in this review was purchased by the reviewer. It was not provided by mifold. As always, all opinions are our own!