When developing a children’s swim vest for the European market, buoyancy is only one part of the compliance process.
A product may perform well in the water but still require changes because of its warning text, product markings, packaging, instructions, sizing information, color visibility, or document consistency.
Preparing these details before submitting samples can reduce revisions, re-testing, and delays.
1. Product Construction and In-Water Performance
The product must meet the relevant performance and construction requirements for its intended user group.
The fit, size range, buoyancy layout, body position, and intended weight range all need to work together. A vest cannot be assessed only by checking how much foam it contains.
For products with removable buoyancy inserts, all required inserts must be installed for the product to meet its intended buoyancy performance. The instructions should make this clear to the user.
2. Warning Information Must Be Visible
Warning information is part of the product, not something to add casually after testing.
The warning should be printed, embossed, or otherwise permanently applied to the product. It must remain clearly visible when the product is being prepared for use and while it is worn.
Key formatting points include:
- WARNING, DO NOT USE, and RISK OF CAPSIZING should appear in bold uppercase.
- These words should be at least 5 mm high.
- Other important safety information should generally be at least 3 mm high.
- The warning must have enough contrast against the background.
Common warning content may include:
WARNING: WILL NOT PROTECT AGAINST DROWNING.
USE ONLY UNDER CONSTANT SUPERVISION.
Additional warnings may be required depending on the design, especially for inflatable products, armbands, or products with multiple components.
3. Safety Symbols Have Their Own Requirements
Graphical symbols can sometimes support or replace certain written warnings, but they must follow the correct format and application requirements.
General points include:
- Symbols on the product should usually be at least 30 mm × 30 mm.
- For armbands and similarly small swimming devices, they should usually be at least 20 mm × 20 mm.
- Symbols should be grouped by purpose, such as warning, instruction, and prohibition.
- Key safety symbols should use the required colors.
- Other symbols must contrast clearly with the background.
A symbol should not be resized or recolored only to fit the artwork.
4. Languages Must Match the Country of Sale
Language consistency is easy to overlook.
Warnings, product markings, packaging, care labels, and instructions should all be provided in the language required by the country where the product will be sold.
A common mistake is using:
- Three languages on the product
- One language on the care label
- Four languages in the manual
- A different language on the packaging
Even when the wording itself is correct, inconsistent language coverage can create problems during review.
Before production, brands should confirm exactly which European markets the product will enter and prepare the same language set across all files.
5. The Product Must Show the Correct Identification Information
The product and its related documents should clearly identify the item and the responsible company.
Important information may include:
- User body-weight range
- Applicable size range
- Product model, name, or code
- Manufacturer, importer, supplier, or trademark information
- Production date or batch information
- Product lifetime or expiry information
- Applicable standard
- Optional age guidance linked to the body-weight range
Body weight is especially important. Age can be used as additional guidance, but it should not replace the intended weight and size range.
6. Packaging Is Part of Compliance
Packaging is not only for retail presentation.
It should communicate key safety and product information before purchase.
The packaging may need to show:
- Drowning warning
- Constant-supervision warning
- User weight and size range
- User category
- Company or trademark information
- Product model or code
- Production batch or production date
- Applicable standard
- Required market languages
The information should be clear and easy to read at the point of sale.
7. The User Manual Needs More Than Basic Wearing Instructions
The instruction manual should help the customer select, use, maintain, and store the product correctly.
Depending on the design, it may need to explain:
- How to put on, adjust, and remove the product
- How to check that the product fits correctly
- How to inflate, deflate, and close valves, where applicable
- How to install or adjust buoyancy components
- How to clean, maintain, and store the product
- Which users and weight ranges the product is suitable for
- How to recognize the end of the product’s usable life
- The recommended maximum service life
- Relevant misuse warnings
- The manufacturer’s full postal address
Where required, the instructions should also include the applicable PPE statement and access to the EU Declaration of Conformity.
8. Markings Must Remain Legible
Correct wording is not enough if the printing disappears during use.
Marked areas may be checked using dry and wet rubbing. After repeated rubbing, the warning and product information should remain readable.
This affects:
- Printing method
- Ink compatibility
- Fabric surface
- Color contrast
- Warning position
- Resistance to rubbing and moisture
A warning may look acceptable on the first sample but still fail if it rubs off too easily.
9. Color Visibility Can Affect the Result
Color is not only a branding decision.
The product should remain sufficiently visible against different backgrounds and water conditions.
Blue and green may present a higher risk when used as the dominant color because they can blend into water environments.
This does not mean they are automatically prohibited. A safer approach is to:
- Avoid using blue or green as the main body color
- Keep them to smaller areas or decorative elements
- Combine them with brighter, high-contrast colors
- Review the complete product from different angles
- Confirm the artwork with the testing laboratory before producing test samples
The visibility assessment is based on human evaluation rather than a machine. Different testing companies, or different assessors within the same company, may judge the same color combination slightly differently.
Because of this, another brand passing with a similar blue or green design does not guarantee the same result.
10. Product, Packaging, Labels, and Manual Must Match
Consistency is one of the most important parts of the project.
The following details should match across all files:
- Product name and model
- Weight and size range
- Warning wording
- Languages
- Manufacturer or brand information
- Production date or batch
- Product lifetime
- Applicable standard
- Instructions for removable or inflatable components
A change made in one file should be updated everywhere.
For example, changing the body-weight range on the packaging but leaving the old range on the care label can create unnecessary questions during review.
11. Check the Testing Company Before Sending Samples
Not every testing company has the same recognized scope.
Before sending samples, confirm:
- Which version of the standard will be used
- Whether the testing company has the required scope
- Sample quantity for each size
- Required fabric panels and printed panels
- Required labels
- Testing lead time
- Whether packaging and manuals must be submitted
- Whether a Notified Body is involved
- Which documents will be issued after completion
This helps avoid incomplete submissions and unnecessary delays.
Common Mistakes That Delay EN 13138 Projects
Many delays come from details that could have been corrected earlier:
- Using low-visibility colors as the main design
- Preparing packaging after testing has already started
- Missing target-market languages
- Inconsistent warnings across different files
- Warning text that is too small
- Symbols that are too small or use the wrong colors
- Missing user weight or size information
- Missing company or product identification
- Instructions that do not explain fitting, storage, maintenance, or lifetime
- Markings that rub off easily
- Using different product names or model codes in different documents
- Sending samples before confirming the testing company’s requirements
Factory Insight
A successful EN 13138 project should not begin with the test sample.
It should begin with a full review of:
- Product structure
- User weight and size range
- Buoyancy configuration
- Color visibility
- Warning artwork
- Care label
- Packaging
- User instructions
- Language requirements
- Testing submission requirements
When these details are reviewed together, the process is usually much smoother.
Final Thoughts
EN 13138 is not only about buoyancy.
It also covers how the product is designed, identified, seen, worn, explained, maintained, and presented to the consumer.
For brands entering the European market, the safest approach is to treat the product, warning label, packaging, and instruction manual as one complete compliance package.
Reviewing everything before sampling can reduce artwork changes, additional samples, re-testing, and missed launch dates.
Need help preparing an EN 13138 project?
We can review the product structure, color design, warning artwork, labels, packaging, and instruction files before test samples are produced, helping identify potential issues earlier in development.