Your baby’s well-being is our top priority and we know it’s yours, too. We are committed to the quality of our product, and as parents ourselves that use the product with our own children, we stand by it.

A small number of our users notice red marks on their baby’s foot after use of the Owlet Smart Sock. While this is not a common occurrence, we take this seriously, which is why we want to address these red marks head on. Just like a baby shoe that is too tight or too small, it can be uncomfortable for your child and leave marks. Our research, in partnership with dermatologists and pediatricians, shows that these marks are not electrical or thermal burns but are instead related to pressure or friction.

The friction marks can result from a number of factors, including sock sizing, tightening, and placement. 

Pay close attention to sock fit. Just as we look for the proper fit in the shoes we wear, parents should check the fit of the Smart Sock each time.



Incorrect use of the sock could result in marks, pressure marks, or blisters on your baby’s foot.

We have Owlet Sock Fitting Experts available to help you at 844-334-5330 or email us at We’re here to answer any further questions!  

Your baby’s safety is our top priority and we know it’s yours too, so please read the following for a better understanding of what a red mark is and how you can prevent it.


How Do These Marks Occur?



Just like a baby shoe that is too tight or too small, it can be uncomfortable for your child and leave marks. Our research, including collaborating with top-rated dermatologists and pediatricians, has shown that these red marks are not burns due to heat or electrical contact with your baby’s skin, or a product malfunction, but instead are pressure or friction marks. In the small amount of red marks cases we’ve seen, pressure marks are generally associated with over tightening of the newborn size 1 sock (original sock style).  

The pressure mark can occur if too much pressure is applied to the skin for extended periods of time. Your newborn’s skin is sensitive and can be easily agitated if the newborn size 1 sock is too tight on your baby’s foot or worn for an extended period of time, potentially resulting in a red mark on the foot.

Blisters, although uncommon, are associated with the sizes 2 and 3 socks (original sock style) and can form on the side of the foot or near the pinky toe when the sock is too tight, incorrectly placed, or too small. Generally, these marks are seen in babies who are wearing a size 2 or 3 sock, but should be in the next size up. The friction can be amplified if the baby kicks their feet often while wearing the sock. It’s the same chaffing that adults may experience with shoes that don’t fit properly, but can occur more easily with babies due to their sensitive skin.  


What Do Parents Need to Know About Alleviating Red Marks and Blisters?

It is important to consider proper use, sizing and sock placement, to prevent or limit red marks and friction burns. Here’s what you can do:

Newborn Size 1 Sock (Original Sock Style)

Red marks are most common in the newborn size 1 sock because the baby’s skin is so soft and sensitive, and is easily susceptible to irritation. We now include a right-footed newborn size 1 sock in every Owlet box so that you can switch the monitor between feet every four to five hours, up until your baby outgrows the newborn size 1 sock. 

Sizes 2 and 3 Socks (Original Sock Style)

Although very rare, when we do get a report of a blister, it is because the sock, usually a size 2 or 3, was too small, overtightened or not positioned correctly.

All Sock Sizes

  • Use the correct sock size.
  • Correctly position the sock and sensor.
  • Do not overtighten the sock.

These are not electrical burns or burns due to the device overheating. Red marks or blisters, while rare, are shown to occur due to incorrect sock sizing, over tightening, and incorrect placement. Read more here on proper sock size selection, placement, and tightening.  

The updated fabric sock provides increased comfort for infants and creates an overall better experience when using your Owlet device. If you have the original fabric sock, please call our team to request, for free, an updated fabric sock set.


What Do I Do or Who Do I Contact If I See a Red Mark or Blister on My Baby’s Foot?

As we’ve mentioned, we do not take these marks lightly. We’re moving mountains to make sure our Owlet parents who experience a red mark or blister get the best care and support.

Here is what we recommend doing if you notice one of these marks:

  1. Give the foot rest. Letting the foot rest by not using the monitor for a couple of days will help the red mark fade faster.
  2. Use the next sock size. In our research, we’ve found that most marks go away after switching to a larger size. Why? Babies’ feet grow quickly and you may need to change sock sizes sooner than you might expect. Please use our sock sizing guidelines to help you find the right Smart Sock fit for your child. If the next size is too big, use our sock sizing guidelines with your current sock to help you know how tight to put it on.
  3. Use a regular sock over the smart sock. Sometimes all you need to get the right tightness is just a little help from a good, old-fashioned regular sock. First, put the smart sock, but keep it loose. Next, put a regular sock over the smart sock to help hold the electronics in place. This will help you get good readings, but the sock won’t be too tight
  4. Switch feet. Alternate every 4-24 hours between the right and left side with the electronics to give each foot a rest.

We have an Owlet Parent Advocate dedicated to supporting parents. If you see a red mark or blister on your baby’s foot, please email or call 844-334-5330.  


Owlet’s Safety Promise

Owlet is always innovating and updating the product to make it more usable and comfortable. 

The Owlet Team has carefully designed the Smart Sock to be as safe and comfortable as possible. In addition to all required regulatory testing and standards for product safety and product use with infants, we've rigorously challenged every aspect of the Owlet Baby Monitor through extensive in-office testing, over 10,000 hours of in-home testing, and additional laboratory and accuracy testing. 

Was this article helpful?
0 out of 0 found this helpful