What Does ISO 3533 Say About Sex Toy Safety?
When choosing a sex toy, terms like “body-safe,” “premium,” and “high quality” can be difficult to evaluate on their own.
So what does sex toy safety actually mean?
One useful reference is ISO 3533:2021, an international standard specifically developed for manufactured sex toys intended to come into direct contact with the genitals and/or anus.
The standard focuses on three closely connected areas: materials, product design, and user information. Its purpose is to reduce foreseeable risks and help ensure that users have sufficient information to use products safely. (ISO)
This guide explains the main safety principles covered by ISO 3533:2021 and what they mean for consumers.
What Is ISO 3533:2021?
ISO 3533:2021 — Sex toys — Design and safety requirements for products in direct contact with genitalia, the anus, or both was published in September 2021.
The standard applies to manufactured products intended for sexual stimulation or to enhance sexual pleasure when those products are designed for direct contact with the genitals and/or anus. (ISO)
It is specifically concerned with:
- Product design
- Mechanical safety
- Materials
- Material safety
- Biocompatibility
- Cleaning and maintenance
- Electrical and vibration-related considerations
- Surface temperature
- User instructions and safety information
The standard is not primarily intended for products classified as medical devices, cosmetics, or assistive products, such as lubricants and massage oils. (ISO)
1. Safety Starts With Intended Use
One of the fundamental ideas behind ISO 3533 is intended use.
A product should be designed around how it is actually intended to be used, while also considering reasonably foreseeable misuse.
That means safety is not simply a question of whether a material is “good” or “bad.”
The shape, dimensions, construction, moving parts, materials, packaging, instructions, and foreseeable ways the product might be misused can all form part of the safety assessment. (GSO Sims Preview Doc)
For consumers, this translates into a simple principle:
A sex toy should be designed for its intended use, and its safety information should make that intended use clear.
2. Design Safety: More Than Just Shape
ISO 3533 includes a range of design-related safety considerations.
These include mechanical hazards, moving and removable parts, vibration, electrical safety, surface temperature, wireless remote-controlled products, and potentially hazardous surfaces, corners, edges, and protruding parts. (GSO Sims Preview Doc)
The objective is not to make every product look the same. It is to reduce the risk of injury during reasonable and foreseeable use.
Mechanical hazards
Mechanical safety becomes particularly important when a product is designed for insertion.
For products intended for anal use, ISO 3533 specifically addresses the risk of retention and requires appropriate design features to prevent the product from being inserted farther than intended. The effectiveness of relevant design features is also intended to be tested and documented. (GSO Sims Preview Doc)
For products that enclose the genitals, the standard also addresses emergency removal and requires designs that allow the product to be safely removed. (GSO Sims Preview Doc)
These requirements illustrate an important point:
Sex toy safety is partly a design problem, not simply a material problem.
3. Materials Matter
A product can have an excellent design and still require careful consideration of the materials that come into contact with the body.
ISO 3533 therefore contains a dedicated section covering materials, including general material safety and biocompatibility. (GSO Sims Preview Doc)
The standard states that manufacturers should ensure that chemicals present in the product are not used in quantities known to be harmful to the user. It also addresses the establishment of a Restricted Substance List (RSL) for substances that should not be present in materials that come into contact with mucosa. (iTeh Standards)
This is why simply describing a product as “body-safe” is not enough information by itself.
A more useful approach is to understand:
- What material is actually used?
- Which parts of the product come into contact with the body?
- Are relevant substances restricted or tested?
- Is there supporting material or laboratory documentation?
- Are the product’s intended uses clearly defined?
Material transparency gives consumers something much more meaningful than a generic marketing claim.
4. Biocompatibility Is Part of the Picture
ISO 3533 also includes biocompatibility within its materials requirements. (GSO Sims Preview Doc)
This matters because products intended for intimate contact interact with particularly sensitive areas of the body.
However, “biocompatible” should not be treated as a universal label that automatically means a product is suitable for every person, every body area, or every possible use.
Safety depends on the material, the intended contact, the product’s construction, and how it is used.
For this reason, product-specific information is important.
5. Cleaning and Maintenance Are Part of Product Safety
A safe product is not only about what happens when you first open the package.
Cleaning and maintenance are also addressed by ISO 3533. (GSO Sims Preview Doc)
The appropriate cleaning method depends on the product’s materials, construction, electronics, and intended use.
For consumers, this means that cleaning instructions should be treated as part of the product’s safety information rather than as an optional afterthought.
Before cleaning a sex toy, check the manufacturer’s instructions for:
- Recommended cleaning methods
- Whether the product is waterproof or water-resistant
- Whether charging components need to be protected from water
- Which cleaning products are appropriate
- How the product should be dried and stored
A product should always be cleaned according to its specific instructions.
6. User Information Is a Safety Feature
One of the most interesting aspects of ISO 3533 is that it does not treat safety as something that exists entirely inside the physical product.
The standard also contains a dedicated section on user information, including information provided on the product, packaging, and additional user information. (GSO Sims Preview Doc)
This makes sense.
Even a well-designed product can be used incorrectly if the user does not know:
- What the product is intended for
- How it should be used
- How it should be cleaned
- What precautions apply
- What limitations the product has
Good instructions therefore form part of the overall safety system.
7. What About Electrical and Vibration Safety?
For powered products, ISO 3533 also addresses areas such as:
- Vibration
- Electrical safety
- Electrical stimulation
- Surface temperature
- Wireless remote-controlled products
These considerations recognize that a powered sex toy introduces additional potential hazards compared with a simple non-powered product. (GSO Sims Preview Doc)
For consumers, useful questions include:
Does the product become unusually hot during normal use?
Are charging instructions clear?
Is the product designed for the environment in which it is intended to be used?
Are controls and moving parts designed appropriately?
Again, safety is the result of the entire product system rather than a single material label.
8. What ISO 3533 Does Not Mean
It is important to understand what an ISO standard does — and does not — tell you.
ISO 3533 provides a framework of design, material, safety, and user-information requirements for the products within its scope. (ISO)
It does not mean that every sex toy on the market is automatically certified by ISO.
It also does not mean that simply mentioning “ISO 3533” proves that a particular product has been tested against every requirement in the standard.
Product-specific claims should always be supported by appropriate documentation or testing.
That distinction matters when evaluating safety claims online.
9. A Better Way to Think About “Safe”
Instead of asking only:
“Is this sex toy body-safe?”
consider asking a broader set of questions:
Materials
What materials are used in the parts that contact the body?
Design
Has the product been designed around its intended use and foreseeable risks?
Mechanical safety
Could the product become stuck, break, or create another foreseeable mechanical hazard?
Electrical safety
For powered products, are charging, electrical, vibration, and temperature considerations addressed?
Cleaning
Are clear cleaning and maintenance instructions provided?
User information
Does the manufacturer clearly explain how the product should and should not be used?
Evidence
Are safety-related claims supported by relevant testing, specifications, or other documentation?
This approach gives consumers a much more meaningful way to evaluate a product than relying on marketing language alone.
10. What ISO 3533 Means for Consumers
ISO 3533:2021 is useful because it treats sex toy safety as a system.
Safety is not simply:
“The product is made from silicone.”
It involves the relationship between:
Material + Design + Intended Use + Manufacturing + Testing + Cleaning + User Information
A responsible approach to sexual wellness products therefore looks beyond a single claim and asks whether the product has been thoughtfully designed, appropriately documented, and clearly explained to the person using it.
For consumers, that means better questions.
For manufacturers and retailers, it means greater responsibility to provide accurate and useful product information.
Our Approach to Product Safety
At Femi Flow, we believe that consumers should be able to understand what they are buying rather than having to rely solely on vague claims such as “premium” or “body-safe.”
As we develop our product information, we use established safety principles and relevant industry standards as references for evaluating the information consumers need.
For each product, our goal is to provide clear information about:
- Materials
- Intended use
- Product specifications
- Cleaning and maintenance
- Compatibility information where applicable
- Relevant testing and documentation
As product-specific documentation becomes available, we will continue to add more detailed information to this guide.
Transparency should be part of the product experience — not something consumers have to investigate for themselves.
Reference
ISO 3533:2021 — Sex toys — Design and safety requirements for products in direct contact with genitalia, the anus, or both
Published by the International Organization for Standardization (ISO), September 2021. (ISO)
This article is provided for consumer education and does not constitute medical or legal advice. Product-specific safety claims should be supported by appropriate documentation and testing.