Underwear is one of the most personal pieces of clothing we wear—every single day, right against our most sensitive areas. Yet, most people spend more time choosing a phone case than thinking about what’s going on under their pants. If you're wearing synthetic underwear made from materials like polyester it might be time to think about what is underneath.
What many don’t realize is that synthetic fabrics can have serious long-term impacts—not just on comfort, but on health, hygiene, and even fertility. Let’s break down why synthetic underwear might not be the best choice, and what to look for instead.
Breathability
Synthetic materials like polyester are often chosen by manufacturers because they’re cheap, durable, and can stretch. But what they make up for in cost, they lack in comfort and breathability.
Unlike natural fibers, such as cotton, synthetic fabrics don’t allow your skin to breathe properly. They keep heat and moisture, creating a warm environment—a perfect breeding ground for bacteria, this can lead to:
- Skin Irritation
- Infections
- Unpleasant smell
- Increased sweating
Over time, this lack of ventilation can make daily wear not just uncomfortable, but also risky for your skin's health.
Impact on Male Fertility
One of the most serious and under-discussed issues is the potential impact of synthetic underwear on male fertility.
A 1993 study conducted by researchers from the University of Sheffield linked polyester underwear to reduced sperm production in men. An excessive heat caused by polyester could negatively affect the testosterone, leading to decreased sperm count and affect male fertility..
While not all studies agree on the extent, experts do agree on one thing: your underneath needs to stay cold. Anything that raises their temperature, tight synthetic underwear included, can affect sperm health.
Environmental impact
Beyond personal health, synthetic underwear is also harmful to our planet. Materials like polyester are made from petroleum, a non-renewable resource. Each wash releases microplastics into water systems, which end up in oceans and even our food.
Natural materials like organic cotton, on the other hand, are biodegradable, renewable, and don’t spread plastic particles into the environment.
What’s the Better Alternative?
So, what should you look for instead of synthetic?
- Organic cotton: Breathable, hypoallergenic, and gentle on skin.
- OEKO-TEX® or GOTS-certified materials: These certifications ensure fabrics are tested for harmful substances and produced responsibly.
Also, choose a fit that doesn’t keep heat—boxer briefs or relaxed boxers are ideal for maintaining comfort and breathability.
Many people normalize discomfort in their underwear—itching, sweating, but discomfort means that something isn’t right. Synthetic fabrics tend to heat in ways that interfere with your natural movement and temperature regulation.
Over time, that “just annoying” feeling can turn into persistent irritation or skin problems. Comfortable underwear made from breathable, natural materials isn’t just a luxury—it’s a way of respecting your body and avoiding health issues.
All inclusive
Your underwear should protect, not harm. While synthetic fabrics may be cheap and colorful, they often come at the hidden cost of discomfort, skin irritation, and even long-term health risks. Choosing high-quality, natural fabric underwear is not just a comfort decision, it's a healthy one. However, you can choose both by purchasing The Mad Nuts you get the unique design experience and organic cotton made boxers which don’t bring you discomfort.
Start paying attention to what’s under your jeans. Your body will thank you.
