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Swimming & Water Sports · Explainer
Swimwear: What You Need To Know
Learn how to read swimwear specifications and choose the right style for your needs.
Published · 1 min read
When it comes to swimwear, understanding the technical details can help you make a better choice. Whether you're a regular pool user or an occasional swimmer, knowing what each specification means is crucial.
Chlorine, Not Wear, Is What Ends Most Swimwear
Elastane and PBT are the stretch fibres in swimwear that degrade over time when exposed to chlorine. Polyester is less affected but still wears out eventually. The key here is to find a balance between comfort and longevity.
The Cut Decides What It Can Be Used For
Jammer shorts are perfect for competitive swimming as they reduce drag. Briefs offer the most coverage but can be cumbersome in the pool. Board shorts provide freedom of movement and comfort on land.
The swimwear we currently track on Amazon UK, ordered by verified customer rating. They are here so you can read a real listing against the explanation above — we have not tested them, and the ratings shown are Amazon's.
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Frequently asked questions
What is the difference between elastane and PBT?
Elastane provides more stretch but degrades faster in chlorine. PBT offers less stretch but holds its shape better.
Does lining make swimwear more comfortable?
Yes, a lining keeps the suit opaque and adds support, making it feel more comfortable against your skin.
How does drag affect my swimming performance?
Closer-fitting swimwear reduces water resistance, improving your speed. Loose fabric and pockets increase drag, slowing you down in the pool.
Who wrote this
The TrailHaven editorial team. We research and write these explainers from published standards, manufacturer specifications and verified customer feedback on Amazon UK — not from hands-on testing, which we do not claim to have done. Where a figure comes from a test standard we name the standard; where it is a rule of thumb, we say so. Corrections are welcome via the contact page.