Polyester underwear doesn’t just trap heat—it also builds up electrostatic charges that may impact male fertility. Studies suggest these charges could interfere with physiological functions, raising concerns about their long-term effects.
By
Kiavash Seraj
4
minute read
The Experiment
A study examined the electrostatic potentials generated on the scrotal area when wearing different fabrics. 21 men were divided into three groups, each wearing underwear made of either 100% polyester, 100% cotton, or a 50/50 polyester-cotton blend. Researchers measured the electrostatic charges on the fabric and skin using a kilovoltmeter.
Key Findings: - Cotton produced no electrostatic charges. - Polyester generated the highest electrostatic potential (average 338.9V/cm²), while the polyester-cotton blend had lower but still significant levels (148.3V/cm²).
- Higher electrostatic charges were observed during the day due to increased temperature.
This charge accumulation results from friction between the fabric and skin, creating an electrostatic field that penetrates the scrotum. Scientists suggest that this could disrupt testicular function and sperm production, posing potential risks to male fertility.
This study highlights yet another reason to choose natural fabrics like organic cotton over synthetic materials. Polyester-based underwear doesn’t just trap heat—it may also expose sensitive areas to electrostatic stress, with long-term health implications.
Analysis
Basically, we know that polyester underwear is a problem thanks to studies that have isolated the fabric factor and measured its impact on sperm count, concentration, motility, and abnormality. However, while electrostatic potential has been measured on the skin, it's currently just a correlation. That said, I highly doubt that hundreds of volts of potential energy on your balls are harmless. Interestingly, there are independent studies on the effects of these potentials on the body as a whole—but not specifically on fertility.
One study even claims that "virtually all physiological functions, mood, and behavior" may be affected by charges left on the skin. The conclusion here is straightforward: polyester underwear has measurable negative effects on men's fertility. The only catch? We’re not yet certain about the exact mechanism behind this deterioration.
That being said, we know the symptoms of polyester exposure, one of which is electrostatic residue on the skin—including the scrotum when it comes to underwear. Meanwhile, independent research suggests that electrostatic potentials and charges on the skin—regardless of the specific body region—can impact various physiological functions.2
There’s still much more research to be done, but one thing is certain: cotton underpants play no part in the love triangle between polyester, infertility, and electrostatic potentials. Time and time again, cotton proves to be one of, if not the best, fabrics for supporting healthy hormones and male fertility.
Citations
1. Shafik, A., Ibrahim, I. H., & el-Sayed, E. M. (1992). Effect of different types of textile fabric on spermatogenesis. I. Electrostatic potentials generated on surface of human scrotum by wearing different types of fabric. Andrologia, 24(3), 145–147. https://doi.org/10.1111/j.1439-0272.1992.tb02628.x
2. Sher L. (2000). Effects of electrostatic potentials generated on the surface of the skin by wearing synthetic and semisynthetic fabrics on physical condition, mood and behavior: role of acupuncture points. Medical hypotheses, 54(3), 511–512. https://doi.org/10.1054/mehy.1999.0854
