The study, “Contraceptive efficacy of polyester-induced azoospermia in normal men” found that men who wore polyester underwear for 12 months became azoospermic (had no sperm in their semen). The study also found that the men who wore polyester underwear had a lower testicular volume and a higher rectal-testicular temperature difference than men who wore cotton underwear.

The researchers believe that the tight fit of polyester underwear, the synthetic chemicals, and the heat it traps may contribute to the lower sperm count. Organic cotton underwear such as Opok’s briefs, on the other hand, is a looser-fitting fabric that allows heat to escape more easily. This makes it a better choice for men who want to protect their sperm health.

In addition to the study cited above, there are a number of other studies that have shown that synthetic fabrics can have a negative impact on sperm health. For example, a study published in the journal Environmental Science & Technology found that men who wore synthetic underwear had a 23% lower sperm count than men who wore cotton underwear.

The dangers of synthetic chemicals in underwear can be attributed to a number of factors. First, synthetic fabrics are often treated with chemicals that can be harmful to sperm health. These chemicals can include phthalates, which are used to make plastics soft and flexible, and bisphenol A (BPA), which is used to make plastics clear and hard.

Second, synthetic fabrics can trap heat, which can also be harmful to sperm health. Sperm production is best at temperatures that are slightly cooler than body temperature. When the scrotum is kept too warm, it can interfere with sperm production.

Third, synthetic fabrics can be irritating to the skin, which can lead to inflammation. Inflammation can also have a negative impact on sperm health.

Natural fabrics, on the other hand, are not treated with harmful chemicals and they allow heat to escape more easily. This makes them a better choice for men who want to protect their sperm health.

Opok creates all of our apparel with organic cotton. It is a natural fabric that is grown without the use of harmful chemicals. It is also a breathable fabric that allows heat to escape easily. This makes it a good choice for men who want to protect their sperm health.

In addition to being better for sperm health, organic cotton is also a more sustainable choice than synthetic fabrics. Synthetic fabrics are made from petroleum, which is a non-renewable resource. Organic cotton, on the other hand, is grown from a renewable resource.

If you are concerned about your sperm health, you may want to consider switching to organic cotton underwear. It is a breathable, comfortable, and sustainable choice that can help to protect your sperm health.

If you are looking for a comfortable, breathable, and sustainable choice of underwear, organic cotton is a great option. It can help to protect your sperm health and make you feel good about your choice.

 “I've been wearing organic clothing for some time, yet the quality has never been comparable to other mainstream clothing brands. Opok is the first organic clothing brand that focuses on style and comfort.” — James