Are Fitbit Straps Safe? The Truth About PFAS and Skin Safety

If you have ever found yourself wondering, “Are Fitbit straps safe?”, you are far from alone in asking this question. As more and more people wear their smartwatches and fitness trackers all day long, questions have been growing about what these straps are actually made out of, and whether there is a possibility that they could contain substances that might not be so kind to our skin or health.

One of the biggest talking points since fitness tech has really started to boom has been PFAS, which are often referred to as “forever chemicals”. These substances have been used in a wide range of consumer products for many years before wearable tech started to become fashionable. They are valued for their resistance to water and sweat, but they have also been linked to environmental persistence and some potential health risks. So, do Fitbit straps contain PFAS, and if they do, are they worth worrying about?

What Exactly Are PFAS?

PFAS stands for per- and polyfluoroalkyl substances. They are a family of synthetic compounds that are used to create products that will resist moisture and dirt. Common uses are things such as non-stick kitchen pans and waterproof jackets. Their main strength is that they are extremely durable, but that durability aspect is also what has made them a concern in the fitness tracking space. PFAS do not break down easily in the environment or in the body, which is what earned them that nickname of “forever chemicals”.

Recently, attention has turned more closely to wearable tech, including Fitbit and similar brands, because these devices are worn directly against the skin for such long periods of time. Researchers wanted to know whether PFAS could be found in fitness watch bands, and if so, how much contact users might be getting with them every day.

What Recent Studies Have Found

A study that was published in late 2024 by researchers from the University of Notre Dame examined a selection of popular smartwatch and fitness tracker straps. They discovered that some contained measurable levels of PFAS, particularly those that were made with a material known as fluoroelastomer, which is a type of synthetic rubber used for its flexibility and its resistance to sweat.

The study didn’t go as far as naming specific brands or device models, but it did note that fluoroelastomer straps were the most likely to contain PFAS, while silicone, leather, nylon, and stainless steel bands showed much lower or negligible levels. This means that while some Fitbit straps could contain PFAS, it largely depends on the exact material that has been used in the design.

It is very important to recognise that PFAS are not automatically dangerous in every single use case. The research is yet to show exactly how much exposure results from wearing a strap that contains these compounds. What it does highlight, though, is that PFAS can transfer through the skin under conditions that involve a combination of heat, sweat, and friction, all of which will be very common when using a fitness tracker during exercise.

Do Fitbit Straps Contain PFAS?

Fitbit’s own official straps are made from a range of different materials, including silicone, nylon, stainless steel, and fluoroelastomer. The latter is commonly used in Fitbit’s sport bands because of its soft and flexible feel and resistance to sweat. Fluoroelastomer, by definition, is a fluorine-based polymer, which means that it likely contains PFAS.

However, this doesn’t necessarily mean your strap that is clipped to your Fitbit is unsafe. Regulatory authorities have not banned fluoroelastomer, and there is actually no current evidence that shows that wearing one will pose any immediate harm to the user. The main concern, though, is that long-term exposure and the possibility that PFAS might build up over time if worn continuously against the skin.

If you prefer to stay on the safe side or need a better Fitbit wristband for a sensitive skin condition, it is sensible to choose a strap that has been produced using alternative materials such as premium-grade silicone or woven nylon fabric. Both of these are considered to be completely PFAS-free or far less likely to contain any fluorinated compounds.

Are PFAS Dangerous When Worn in Fitbit Wristwear?

The science on PFAS and skin contact is still ongoing, but we already know that PFAS are associated with various health issues when they are ingested or inhaled in large quantities. For example, contaminated water, but far less is known about the effects of skin absorption.

As we mentioned above thought the early research does suggest that the skin can absorb certain PFAS compounds, especially when sweat or friction is regularly present. However, the exact amount of absorption from a watch strap is expected to be very small. The concern is more of a cumulative one, in the sense that PFAS exposure from multiple sources already exists in everyday life, so minimising any unnecessary contact may be a sensible step.

So while there is no need for instant panic, there is a good reason to keep yourself informed and make conscious choices about what materials you have strapped against your skin each day.

How to Choose a Safer Strap for Your Fitbit Device

The safest approach is to select straps that clearly state their materials and avoid those containing fluorinated rubbers or coatings. Silicone straps are an excellent alternative because they are soft, durable, and typically free from PFAS. Nylon bands are lightweight and breathable, perfect for all-day wear, while stainless steel and leather options suit those who want something stylish yet skin-safe.

At FitstrapsUK, we put a large amount of care and consideration into the materials we use. All of our replacement wristbands for Fitbit watches are designed with user comfort levels and safety in mind, using hypoallergenic premium-grade silicone, woven nylon, and nickel-free stainless steel that are gentle on the user's skin. We believe transparency matters more than anything, and our customers deserve to know exactly what their straps are made of, without worrying about hidden chemical coatings.

If you already own a fluoroelastomer strap, you don’t necessarily need to bin it as soon as you finish reading this article. Instead, focus on good hygiene and wear habits: remove it regularly to allow your skin to breathe, clean it with warm water and mild soap after any intense workouts, and avoid wearing it too tightly. All of these small steps will work to reduce any potential for irritation or absorption while keeping your strap feeling comfortable and fresh.

The Bottom Line: Are Fitbit Straps Safe?

In most cases, yes, Fitbit straps are safe to wear. The vast majority of users never experience any irritation or discomfort around their wrists, and regulatory agencies have not actually issued any warnings about PFAS found in wearable technology. However, the recent studies do raise some really valid questions about materials such as fluoroelastomer and how they might contribute to our overall exposure to PFAS.

The good news is that safer options are now easily available, if you know where to look. By choosing straps that are made from premium-grade silicone, nylon, or stainless steel, and making sure that you are always purchasing from trusted retailers that prioritise transparency, such as FitstrapsUK, you can take control of reducing your exposure while enjoying the comfort and reliability of your Fitbit tracker.

FAQs

Do Fitbit straps contain PFAS?
Some may do, particularly those that have been made using fluoroelastomer materials. Silicone, nylon, and stainless steel straps are much less likely to contain any PFAS.

Are PFAS harmful when worn on the skin?
The risks appear low for occasional skin contact, but researchers recommend minimising unnecessary exposure since PFAS can accumulate in the body over time.

Which strap materials for Fitbit devices are PFAS-free?
Silicone, woven nylon, stainless steel, and genuine leather are generally considered to be PFAS-free and skin-friendly alternatives.

Should I stop wearing my strap?
No, not necessarily. There is no actual evidence of there being any immediate danger, but if you feel you’d like to be cautious, consider switching to a PFAS-free replacement strap and cleaning it regularly.

Where can I find safe PFA-free Fitbit replacement straps?
FitstrapsUK offers a wide range of high-quality, PFAS-free replacement straps for all Fitbit models. Our focus is always on user comfort and safety, so you can wear your Fitbit with confidence.