After confirming that COPPERFINGER toe socks release copper ions in a sweat-like solution, we wanted to answer another key question:

Does repeated washing reduce the copper content?

Since the copper is embedded in the fibers, it should remain effective even after multiple washes—but we wanted to put it to the test.

Inside the Lab: The Experiment Begins

Stepping into the controlled environment of the lab, our team prepped for a rigorous test. White lab coats, precision instruments, and the hum of high-tech equipment set the stage. The goal? Determine how much copper remains in COES COPPERFINGER socks after extensive washing.

The Experiment Setup

We selected two test samples:

• Sample A: A brand-new COES COPPERFINGER sock (control group, never washed).
• Sample B: A COES COPPERFINGER sock washed 50 times under controlled conditions.

Both samples were subjected to the same scientific process to measure copper retention:

1. Precision Cutting: Identical 2 cm x 2 cm swatches were extracted from the toe area of each sock.
2. Washing Simulation: Sample B was washed 50 times using a laboratory-grade washing machine, following standard care instructions:
   • Temperature: 40°C
   • Spin Speed: 1200 RPM
   • Detergent: 50 mL of a standardized formula
   • Drying Method: Air-dried between each cycle
3. Sweat-Like Extraction: Both sock samples were immersed in 50 mL of synthetic sweat solution (pH 5.5, containing sodium chloride, lactic acid, and urea) for 24 hours at 37°C (human body temperature).
4. Copper Measurement: After extraction, the solution was analyzed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to quantify the dissolved copper ions.

The Results: COES COPPERFINGER Retains 92% of Its Copper Content

After days of testing and hours of precise measurements, the numbers were in:

Breaking Down the Findings

🔬 Retention of 92% Copper Content – Even after 50 washes, the socks still released 92% as much copper as a brand-new pair.

👣 Embedded Copper vs. Surface Coating – The minimal loss confirms that the copper is deeply integrated into the fibers, not just a surface treatment that would wash away quickly.

🦠 Odor & Bacteria Control Remains Effective – Since copper ions actively fight bacteria, this means COES COPPERFINGER socks continue providing antimicrobial benefits wash after wash.

Final Verdict: Long-Lasting Copper Performance

This experiment proves that COES COPPERFINGER socks are built for longevity. Even after 50 washes, the copper remains embedded and continues to release ions, helping to fight odor and bacteria over time.

For athletes, runners, and those who prioritize freshness and hygiene, this means you don’t have to worry about the copper washing away too quickly—it stays with you, just like the performance of the socks.

COES COPPERFINGER: Built to last. Tested to perform.