When we think about shoe eyelets, we often see them as purely aesthetic details: small metal or plastic rings that complete the lacing and contribute to the design. In reality, their role goes far beyond appearance. The eyelet is the link between the lace and the upper, and its strength directly affects not only the look of the shoe, but also its durability and safety.
An eyelet that bends, detaches, or damages the surrounding material can compromise the overall performance of the shoe. This is why quality footwear manufacturers don’t just check the visual finish, but subject eyelets to dedicated tests that simulate the real stresses of daily wear.
How the test works
The eyelet strength test measures the resistance of the fastening point between the eyelet and the upper.
The procedure is straightforward: a lace is fixed to the eyelet and subjected to gradually increasing tension until failure occurs. This replicates the forces applied every time the shoe is laced or worn intensively.
One key detail is the lace itself: its material and thickness can significantly influence the outcome. To ensure reliable results, it is strongly recommended to use the same lace intended for the finished product.
During the test, the following aspects are evaluated:
- the force required to cause detachment or breakage,
- the failure mode, which may occur through deformation of the eyelet, tearing of the upper, complete detachment of the component, or in some cases, lace breakage.
Sample preparation
To obtain consistent and reliable data, the sample is prepared according to standardized procedures:
- a section of the upper with the eyelet applied using the actual production method is selected;
- the sample is conditioned under controlled temperature and humidity;
- during mounting on the testing machine, precise alignment is essential. Incorrect positioning can alter force distribution and compromise the accuracy of the test.
Equipment
The test is carried out using a dynamometer or a universal testing machine, capable of applying a constant and progressive tensile force to the sample.
The load is measured with high-precision load cells, which accurately detect the force required for failure.
Clamping systems are equally important: the grips must secure the sample firmly without introducing additional damage or deformation, ensuring that the results reflect real-life conditions as closely as possible.
Reference standards
Currently, there is no ISO or EN standard specifically dedicated to this test. However, the most widely recognized method in the industry is that developed by SATRA:
- SATRA TM149 – Strength of eyelet facings and other laced fastenings,
which provides detailed procedures for assessing the resistance of eyelets and other lacing systems.
Our laboratory follows an equivalent protocol, ensuring reliable and comparable results.
Why it matters
The eyelet strength test is an essential tool for footwear manufacturers because it helps to:
- prevent defects and post-sale complaints,
- increase the product’s durability,
- select the best materials and fastening techniques,
- guarantee safety and comfort for the end user.
The eyelet strength test is an essential tool to ensure footwear quality, safety, and durability.
Would you like to check the resistance of your shoe eyelets? Contact us for more information or to request a tailored consultation.