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Do You Wear Underwear in Swim Trunks? 5 Reasons Not

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Do you wear underwear in swim trunks? It’s a question that sparks debates and divides opinions among guys. The decision revolves around factors like comfort, hygiene, and available alternatives. Understanding the rationale behind this choice is crucial for an enjoyable beach or pool experience. Let’s delve into the realm of swimwear etiquette to uncover why some opt for undies under swim trunks while others find it unnecessary.

Do You Wear Underwear in Swim Trunks

Why Not to Wear Underwear? 5 Reasons

Why Not to Wear Underwear

Many debate whether to wear underwear under swim trunks, but it can lead to discomfort and irritation due to increased friction and water retention, affecting your beach or pool experience. Now let’s explore why should not wear underwear when swimming.

Chafing and Irritation

When wearing underwear under swim trunks, the risk of chafing and irritation increases due to the friction between the fabrics. This can lead to discomfort during your beach or pool activities. To avoid this issue, opting for a liner-less approach can enhance your overall experience.

Waterlogging Problems

Underwear beneath swim trunks can result in waterlogging, where the fabric retains moisture for extended periods. This not only feels unpleasant but can also lead to skin irritation. By skipping the extra layer, you allow your swim trunks to dry efficiently after each dip in the water.

Bacteria and Chemicals

Research has shown that swimwear, including underwear, can harbor harmful bacteria like E. Coli, posing health risks. Choosing not to wear underwear under your swim trunks reduces the chances of bacterial growth and maintains better hygiene standards at the beach or pool.

Mesh Netting Benefits

The mesh netting integrated into swim trunks serves a crucial purpose by providing support and breathability without the need for additional layers. This feature promotes air circulation, prevents chafing, and ensures quick drying, enhancing your comfort throughout your aquatic adventures.

Swim Trunks Design

Swim trunks are meticulously designed with specific features like mesh netting to offer optimal functionality in water environments. The purpose of netting is to provide support while allowing water to drain easily. Additionally, different material differences ensure durability and comfort tailored for swimming activities.

Alternatives to Underwear

Alternatives to Underwear

For a more comfortable approach, consider alternatives to underwear. These options offer support, quick drying, and enhanced mobility, making them ideal for active water activities without the constraints of traditional underwear. Well, here are 3 types of alternatives for your choice.

Compression Shorts

Compression Shorts offer a comfortable and supportive alternative to traditional underwear beneath swim trunks. The benefits of wearing compression shorts include enhanced comfort during water activities, such as swimming or surfing. These shorts are designed with a built-in ultra-soft, chafe-free boxer brief liner that eliminates the need for additional undergarments. Made from high-quality, quick-drying fabric, compression shorts provide maximum comfort and flexibility for various aquatic adventures.

Liner-less Boardshorts

Opting for liner-less boardshorts is another stylish choice that ensures both comfort and functionality. These boardshorts prioritize comfort and style, allowing you to move freely without the constraints of traditional underwear. By choosing liner-less boardshorts, you can avoid potential irritation caused by extra layers while maintaining a fashionable beach look. Embrace the freedom of movement and enjoy your beach outings with confidence in these versatile boardshorts.

Swim Briefs

For those seeking optimal support and coverage, swim briefs are a popular choice among swimmers. Offering a snug fit and reliable coverage, swim briefs provide the necessary support for your aquatic activities. Explore different styles and designs to find the perfect pair that suits your preferences and enhances your performance in the water.


In conclusion, the debate over whether to wear underwear in swim trunks hinges on comfort, hygiene, and practicality. While some may prefer the added layer for support or familiarity, opting for no underwear can enhance comfort by reducing chafing and waterlogging. The integrated mesh netting in swim trunks serves its purpose well, offering support and breathability without the need for extra layers. Alternatives like compression shorts or liner-less boardshorts provide viable options for those seeking comfort and mobility during water activities. Ultimately, the choice comes down to personal preference and ensuring a pleasant experience at the beach or pool. So, do you wear underwear in swim trunks? It’s a decision that impacts both comfort and enjoyment in aquatic settings.


Q1: Are swimsuits worn with underwear?

Swimsuits are generally designed to be worn without underwear. They often come with built-in liners or mesh netting to provide the necessary support and comfort. Adding underwear can lead to discomfort, chafing, and waterlogging, diminishing the swimwear’s effectiveness and comfort during aquatic activities.

Q2: Should I wear underwear with my swim trunks?

It is not recommended to wear underwear with swim trunks. Swim trunks are designed with built-in liners or mesh netting to offer support and comfort. Wearing underwear can cause chafing, water retention, and increased bacterial growth, making your beach or pool experience less enjoyable.

Q3: What percent of men go commando?

While exact statistics vary, surveys suggest that a significant portion of men, around 5-10%, regularly go commando. Preferences depend on comfort, convenience, and specific activities. In the context of swimwear, many men opt to forgo underwear to avoid issues like chafing and waterlogging.

Q4: Why do swim trunks have mesh underwear?

Swim trunks have mesh underwear to provide support, enhance comfort, and facilitate quick drying. The mesh liner prevents chafing and ensures proper ventilation, allowing water to drain efficiently. This design element eliminates the need for additional underwear, maintaining hygiene and comfort during water activities.

Q5: Do guys wear anything under board shorts?

Guys typically do not wear anything under board shorts, especially if they come with built-in liners. However, some may choose to wear compression shorts or other form-fitting alternatives for added support and comfort during active water sports. Personal preference and the specific design of the board shorts influence this choice.

Q6: What is freeballing?

Freeballing refers to the practice of not wearing underwear under one’s clothing. This term is often used to describe the choice to go without underwear for comfort, freedom of movement, or personal preference. In the context of swimwear, freeballing can help avoid issues like chafing, waterlogging, and discomfort associated with wearing underwear under swim trunks or shorts.


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