What Are Swim Trunks Made Of

swim trunks sample


What Material Are Swim Trunks Made Of?


Manufacturers make swim trunks from man-made woven fabric, primarily using materials like polyester and spandex. The fabric normally is soft, quick dry, lightweight, and non-absorbent. This makes swim trunks comfy for swimming and wearing every day. Commonly found swim trunk fabrics on the market are often pure polyester or a blend of polyester and nylon. They are typically very comfortable and stretchy, providing exceptional comfort during swimming and beach activities.
For instance, peach skin fabric has gained widespread application in beach shorts. It is lightweight, versatile, and highly affordable, making it well-regarded among wholesalers. Some customers prioritize environmental concerns and seek fabric options that are more eco-friendly. This is entirely feasible for swim trunks as well. Polyester, which is a primary component of swim trunk fabric, can be extracted from recycled materials, making it a sustainable choice.

This type of fabric typically performs similarly to regular polyester fabric in terms of performance, with the only difference being a slightly higher price due to its eco-friendly properties.


Swim Trunks Are Quick Drying


Wearing swim trunks at the beach means going in and out of the water a lot. Swim trunks dry quickly for that reason. The material, made from synthetic fibers, doesn’t soak up water. So, when your swim trunks get wet, they dry fast once you’re back on the shore.

The reason for this feature is that the fabric is woven from polyester fibers, and both polyester and nylon, which are the materials of these fibers, are inherently water-resistant. Sometimes, the fabric may become damp only because some water is trapped between the fibers or adheres to the surface of the fibers. Therefore, a gentle breeze or brief exposure to air is usually sufficient to dry it out.


Indeed, this feature is crucial for beach shorts because they are often worn in situations where frequent contact with water is expected. Constant dampness can be uncomfortable, so having quick-drying fabric is essential for maintaining comfort and enjoyment during beach activities.


Swim Trunks Are Light


Swim trunks use thin fabric to make the entire shorts light, with no burden when playing. One pair of swim trunks will be around 0.25-0.3 lbs, which is 110 – 130 grams. Beach shorts typically use fabric with a weight of around 80-130 GSM. Heavy fabric can indeed hinder the convenience and ease of swimming. Lightweight fabrics are preferred for swimwear as they allow for better movement in the water and reduce drag, enhancing the overall swimming experience.
You can check this page to know what GSM means and a detailed explanation.

Swim Trunks Are Sand Free


At the beach, swim trunks should be sand-resistant to avoid taking sand home. Tightly woven fabrics prevent sand from getting in when wearing swim trunks. Manufacturers do not commonly make swim trunks from knitted fabric because it is not sand-free. Knitted fabric fibers have elasticity and are prone to gaps, which makes sand easily trapped during use. These particles may become trapped in the gaps between fibers.

Swim Trunks Are Waterproof



Swim trunks are waterproof. The surface of the fabric will be coated with a waterproof coating. When water drops on the fabric, it will turn into rolling water droplets.
Check the video the see how waterproof the fabric is:

Cotton Is Not Used to Make Swim Shorts


Classical swimming trunks don’t use cotton materials because cotton absorbs moisture. Cotton swim trunks get heavy when wet, which can lead to awkward situations. Some customers like the feel of cotton. In fact, producers add a layer of sanding to the fabric to give it a cotton-like feel, but it remains polyester.

By the way, it’s possible to blend cotton into fabric with polyester as the main component, but a more common practice is to brush polyester to give it a cotton-like feel

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