ZERO GIVE® RESEARCH — CASE STUDY 02 — 2026
Quick answer
In a repeated comparative pendulum friction test of seven soccer grip socks, ZERO GIVE® recorded the highest mean British Pendulum Number (BPN) at 75.
Each sock was tested four times, producing 28 total measurements.
| Soccer grip sock | Mean BPN | Repeated tests |
|---|---|---|
| ZERO GIVE® | 75 | 4 |
| Gain The Edge | 45 | 4 |
| Senda Gravity Pro | 42.5 | 4 |
| Apex | 35 | 4 |
| Havo Speed X | 25.75 | 4 |
| WeFoot | 25 | 4 |
| TRUsox | 25 | 4 |
Under the conditions of this comparison, ZERO GIVE® produced the highest mean pendulum friction reading of the seven soccer grip socks tested. That is the central finding of this case study.
Why we tested soccer grip socks for friction
Grip socks are marketed with phrases such as “high traction,” “sticky,” “non-slip,” “locked in” and “maximum grip.” Those descriptions do not provide a numerical comparison.
For ZERO GIVE® Research Case Study 02, we asked a narrower, measurable question: Which of these seven soccer grip socks produces the highest pendulum friction reading when tested repeatedly using the same comparative setup?
The products evaluated were ZERO GIVE®, Gain The Edge, Senda Gravity Pro, Apex, Havo Speed X, WeFoot and TRUsox.
Test method
Testing was performed using a BM-III pendulum friction tester. The British Pendulum Tester is a dynamic instrument that measures energy lost as a slider travels across a test surface. The result is expressed as a British Pendulum Number, or BPN.
BPN represents friction measured using the particular apparatus and procedure. It should not automatically be assumed to correlate with other friction-measurement systems.
- Products tested: 7
- Tests per product: 4
- Total measurements: 28
- Instrument: BM-III pendulum friction tester
- Reported measurement: BPN
- Reported result: Mean of four tests for each sock
Every final value is an average rather than a single reading. This is an internal comparative product test, not independent laboratory certification or an ASTM E303-certified grip-sock test.
This case study reports testing conducted in-house by ZERO GIVE by Dr. Ralph Carullo. The available recorded test videos are published as primary visual evidence so viewers and independent third parties can inspect the test sequence, observe the displayed readings and assess whether the reported BPN values are supported by the recordings.
Full results
1. ZERO GIVE® — 75 mean BPN
Four repeated measurements
Mean BPN: 75
ZERO GIVE® recorded the highest average BPN of all seven soccer grip socks.
ZERO GIVE® soccer grip sock pendulum friction test — Mean BPN 75, n=4.
2. Gain The Edge — 45 mean BPN
Four repeated measurements
Mean BPN: 45
Gain The Edge produced the second-highest mean reading. ZERO GIVE®’s numerical BPN was 30 points higher.
Gain The Edge soccer grip sock pendulum friction test — Mean BPN 45, n=4.
3. Senda Gravity Pro — 42.5 mean BPN
Measurements: 40, 42, 42 and 45 BPN
Mean BPN: 42.5
Senda Gravity Pro ranked third, below Gain The Edge at 45 BPN and above Apex at 35 BPN. ZERO GIVE® recorded a numerical BPN 32.5 points higher.
Senda Gravity Pro soccer grip sock pendulum friction test — Mean BPN 42.5, n=4.
4. Apex — 35 mean BPN
Four repeated measurements
Mean BPN: 35
Apex ranked fourth. ZERO GIVE® recorded a BPN 40 points higher.
Apex soccer grip sock pendulum friction test — Mean BPN 35, n=4.
5. Havo Speed X — 25.75 mean BPN
Measurements: 25, 25, 25 and 28 BPN
Mean BPN: 25.75
Havo Speed X ranked fifth, slightly above the 25 BPN means recorded by WeFoot and TRUsox. ZERO GIVE® recorded a numerical BPN 49.25 points higher.
Havo Speed X soccer grip sock pendulum friction test — Mean BPN 25.75, n=4.
6 (tie). WeFoot — 25 mean BPN
Four repeated measurements
Mean BPN: 25
WeFoot averaged 25 BPN. ZERO GIVE® recorded a numerical BPN 50 points higher.
WeFoot soccer grip sock pendulum friction test — Mean BPN 25, n=4.
6 (tie). TRUsox — 25 mean BPN
Four repeated measurements
Mean BPN: 25
TRUsox also averaged 25 BPN, tying WeFoot.
TRUsox soccer grip sock pendulum friction test — Mean BPN 25, n=4.
How much higher was the ZERO GIVE® BPN?
| Comparison | Mean BPN | ZERO GIVE® difference |
|---|---|---|
| ZERO GIVE® | 75 | — |
| Gain The Edge | 45 | +66.7% |
| Senda Gravity Pro | 42.5 | +76.5% |
| Apex | 35 | +114.3% |
| Havo Speed X | 25.75 | +191.3% |
| WeFoot | 25 | +200% |
| TRUsox | 25 | +200% |
ZERO GIVE® recorded 1.67× the BPN of Gain The Edge, approximately 1.76× the BPN of Senda Gravity Pro, 2.14× the BPN of Apex, approximately 2.91× the BPN of Havo Speed X, and 3× the BPN of both WeFoot and TRUsox.
These percentages describe differences between numerical BPN readings. They should not be interpreted as “200% more real-world soccer grip,” “3× better performance,” or similar claims.
What does a BPN of 75 mean?
A higher BPN indicates greater frictional resistance measured by the pendulum apparatus under the particular test conditions. Within this comparison: 75 BPN > 45 BPN > 42.5 BPN > 35 BPN > 25.75 BPN > 25 BPN.
The appropriate conclusion is that ZERO GIVE® produced the highest mean pendulum friction reading of the seven soccer grip socks tested.
It would not be appropriate to conclude that 75 BPN equals a coefficient of friction of 0.75. BPN is its own test measurement.
Does BPN equal coefficient of friction?
No. A ZERO GIVE® result of 75 BPN does not mean μ = 0.75. The apparatus measures energy loss during a defined sliding interaction. We publish the original BPN readings rather than attempting to convert them into a coefficient of friction.
Why four tests per sock?
Friction measurements can vary between runs. Four repeated measurements per sock help prevent one unusually high or low reading from determining the final result.
7 products × 4 repeated tests = 28 measurements. The four readings for each product were averaged.
Which soccer grip sock had the highest measured friction?
ZERO GIVE®. It averaged 75 BPN across four tests, the highest result among the seven socks evaluated.
- ZERO GIVE® — 75 BPN
- Gain The Edge — 45 BPN
- Senda Gravity Pro — 42.5 BPN
- Apex — 35 BPN
- Havo Speed X — 25.75 BPN
- WeFoot — 25 BPN (tie)
- TRUsox — 25 BPN (tie)
ZERO GIVE® vs TRUsox
ZERO GIVE® averaged 75 BPN and TRUsox averaged 25 BPN. Both are means from four measurements. ZERO GIVE® recorded three times the numerical BPN under the tested conditions. This does not mean it makes a player three times faster or provides three times more real-world soccer traction.
ZERO GIVE® vs Senda Gravity Pro
ZERO GIVE® averaged 75 BPN and Senda Gravity Pro averaged 42.5 BPN across four measurements. ZERO GIVE® recorded approximately 1.76 times the numerical BPN under this test.
ZERO GIVE® vs Apex
ZERO GIVE® averaged 75 BPN, while Apex averaged 35 BPN. The ZERO GIVE® numerical BPN was approximately 2.14 times the Apex result.
ZERO GIVE® vs Gain The Edge
ZERO GIVE® averaged 75 BPN and Gain The Edge averaged 45 BPN. ZERO GIVE® recorded a mean BPN approximately 66.7% higher.
ZERO GIVE® vs Havo Speed X
ZERO GIVE® averaged 75 BPN and Havo Speed X averaged 25.75 BPN across four measurements. ZERO GIVE® recorded approximately 2.91 times the numerical BPN under this test.
ZERO GIVE® vs WeFoot
ZERO GIVE® averaged 75 BPN, compared with 25 BPN for WeFoot—three times the numerical BPN under this test.
Friction is only one part of grip-sock design
This test isolates pendulum friction. It does not evaluate sock thickness, weight, anatomical fit, moisture management, compression, grip placement, durability or cleat compatibility.
See our Soccer Grip Sock Weight & Thickness Case Study for measured construction data and 2026 Elite Performance Rankings for broader product selection.
What this test supports
- ZERO GIVE® had the highest mean BPN of the seven socks tested.
- ZERO GIVE® averaged 75 BPN.
- Gain The Edge averaged 45 BPN.
- Senda Gravity Pro averaged 42.5 BPN across readings of 40, 42, 42 and 45.
- Apex averaged 35 BPN.
- Havo Speed X averaged 25.75 BPN across readings of 25, 25, 25 and 28.
- WeFoot and TRUsox each averaged 25 BPN.
- Twenty-eight measurements were performed in total.
What this test does not prove
- BPN equals coefficient of friction.
- ZERO GIVE® provides exactly three times more real-world traction than TRUsox or WeFoot.
- Higher BPN automatically makes a player faster or improves soccer skill.
- Every sock produced by each manufacturer will generate an identical measurement.
- The study is independent laboratory certification.
- This represents an ASTM-certified soccer grip-sock protocol.
Frequently asked questions
Which soccer grip sock had the highest BPN?
ZERO GIVE® recorded the highest mean BPN at 75 across four tests.
What BPN did TRUsox record?
TRUsox averaged 25 BPN across four tests.
What BPN did Senda Gravity Pro record?
Senda Gravity Pro averaged 42.5 BPN across four readings: 40, 42, 42 and 45.
What BPN did Apex record?
Apex averaged 35 BPN across four tests.
What BPN did Gain The Edge record?
Gain The Edge averaged 45 BPN across four tests.
What BPN did Havo Speed X record?
Havo Speed X averaged 25.75 BPN across four readings: 25, 25, 25 and 28.
What BPN did WeFoot record?
WeFoot averaged 25 BPN across four tests.
How many tests were performed?
Each of seven socks was tested four times, producing 28 measurements.
Is BPN coefficient of friction?
No. BPN is generated by the British Pendulum testing method and should not automatically be interpreted as coefficient of friction.
Can viewers independently review the test evidence?
Yes. The available recorded test videos are published as primary visual evidence. Viewers and independent third parties can inspect the test sequence, observe the displayed readings, and assess whether the reported BPN values are supported by the recordings.
Was this an independent laboratory test or certification?
No. The testing was conducted in-house by ZERO GIVE by Dr. Ralph Carullo using the same BM-III pendulum setup. The published recordings make the evidence publicly reviewable and viewer-verifiable, but the testing is not represented as independent laboratory testing or certification.
Conclusion
Seven soccer grip socks were compared using repeated pendulum friction testing. Each product was tested four times.
- ZERO GIVE® — 75 BPN
- Gain The Edge — 45 BPN
- Senda Gravity Pro — 42.5 BPN
- Apex — 35 BPN
- Havo Speed X — 25.75 BPN
- WeFoot — 25 BPN
- TRUsox — 25 BPN
ZERO GIVE® recorded the highest mean BPN of all seven soccer grip socks evaluated.
Rather than describing one product simply as having “more grip,” this case study publishes the measurement, repetitions, comparison data, limitations and video evidence so readers can evaluate the results directly.
ZERO GIVE® Research
Measure it. Test it. Publish the numbers.
For the two-brand breakdown, see Zero Give vs Gain The Edge, including the measured construction and friction differences between the tested samples.