Fabric & Technology · 5 min read
Key takeaways
- Not all swimwear fabric is made equal, performance fabric and fashion fabric behave completely differently in the water
- JAYD uses a premium Italian performance fabric engineered for chlorine resistance, colour retention and shape stability
- The 100% PBT lining is genuinely chlorine-proof, most brands use cheap nylon linings that degrade quickly
- Italy is the global standard for high-performance textile manufacturing, sourcing from there matters
- The right fabric means your suit fits the same in week one as it does at the end of the season
If you have ever bought a swimsuit that looked incredible on the rack and was unrecognisable after two months of training, you already understand why fabric matters. The colour fades. The lining bags. The fit that once felt secure starts shifting mid-lap. And you find yourself back at square one, wondering what went wrong.
What went wrong was the fabric.
At JAYD, every single design decision starts with the question: will this hold up? Will it still feel and look the same after a hundred sessions in the pool, a full carnival season in salt water, or a summer of early morning ocean swims? The answer has to be yes, and that starts with choosing the right materials from the very beginning.
Why does swimwear fabric matter so much?
Swimwear is one of the most demanding garments a fabric can be asked to perform in. It faces chlorine, salt water, UV exposure, sunscreen, body oils, and repeated stretching and compression, often all in the same day. Standard fashion-grade fabrics are not designed for this. They are designed to look good on a rack and photograph well. What happens to them in the water is a different story entirely.
Performance swimwear fabric is a completely different category. It is engineered specifically to withstand these conditions, maintaining its structure, colour, and compression even under sustained chemical and environmental exposure. The difference in lifespan between a fashion suit and a performance suit used under the same conditions is not marginal. It is significant.
Why does JAYD source its fabric from Italy?
Italy is widely recognised as the global benchmark for high-performance textile manufacturing. Italian performance fabric mills have been producing technical textiles for elite sportswear for decades, supplying materials used in Olympic swimwear, professional cycling, and competitive water sports at the highest level.
The manufacturing standards, quality controls, and material science that go into Italian performance fabrics are simply not replicated at the same level elsewhere. When JAYD chose where to source its fabric, Italy was the only answer that met the performance brief.
The result is an outer fabric that is:
| Property | What it means for your suit |
|---|---|
| Chlorine resistant | The outer fabric resists chemical degradation from pool use, maintaining its structure and colour significantly longer than fashion-grade alternatives |
| Colour retaining | The dye processes used in Italian performance fabrics are engineered to resist fading from both chlorine and UV exposure, your suit stays vibrant |
| Shape stable | The fabric holds its structure under repeated stretching and compression, meaning the fit you have on day one is the fit you have at the end of the season |
| Quick-drying | Low water absorption means the fabric dries faster between sessions, important for swimmers rotating suits across a training week |
| Sustainably sourced | JAYD's Italian eco fabric is made from regenerated materials including recycled ocean waste, performance and environmental responsibility in the same fibre |
What is a PBT lining and why does it matter?
The lining is the part of your swimsuit that sits closest to your skin. It is also the part that most swimwear brands treat as an afterthought, and it is almost always where suits fail first.
Standard swimwear uses a nylon lining. Nylon is inexpensive, easy to work with, and perfectly adequate for casual swimwear. But under repeated chlorine exposure, nylon linings degrade quickly. The result is a lining that sags, goes transparent, loses compression, and eventually needs replacing, often well before the outer fabric shows any visible wear.
PBT (polybutylene terephthalate) is a completely different material. It is a specialised polyester fibre with properties that make it the gold standard for performance swimwear linings:
What makes PBT different
Genuinely chlorine-proof: Unlike chlorine-resistant fabrics that slow degradation, PBT is engineered to be unaffected by chlorine entirely. It maintains its structure through hundreds of pool sessions.
Shape retention: PBT holds its elasticity and compression over time. A PBT lining does not sag, stretch out, or lose its support regardless of how frequently the suit is worn.
Opacity maintained: PBT linings do not go transparent with pool use, which is the most common and least welcome surprise with cheap nylon linings.
Low water absorption: PBT absorbs very little water compared to nylon, which means the lining dries faster and does not add unnecessary weight when wet.
Most swimwear brands, including many that market themselves as performance brands, use a standard nylon lining and rely on the outer fabric to do all the work. JAYD uses a 100% PBT lining on every single suit. It is one of the most significant points of difference between a JAYD suit and almost everything else on the market.
How do the two materials work together?
The outer Italian performance fabric and the 100% PBT lining are not just two good materials sitting next to each other. They are chosen to work as a system.
The outer fabric handles environmental exposure, chlorine, salt water, UV, sunscreen, maintaining colour and structure on the surface. The PBT lining handles compression and coverage from the inside, maintaining the fit and feel of the suit at the layer closest to your skin. Together, they create a suit that performs consistently from the first session to the last, season after season.
For swimmers, surf lifesavers, and water athletes who spend serious time in and around the water, that consistency is everything. You should not have to think about your suit. You should just be able to get in the water and go.
How does performance fabric compare to fashion fabric?
| Property | Fashion swimwear fabric | JAYD performance fabric |
|---|---|---|
| Chlorine resistance | ✗ Degrades within weeks | ✓ Engineered to resist |
| Colour retention | ✗ Fades rapidly in chlorine and UV | ✓ Stays vibrant season after season |
| Shape over time | ✗ Stretches and sags | ✓ Holds compression and structure |
| Lining | ✗ Standard nylon, degrades quickly | ✓ 100% PBT, chlorine-proof |
| Lifespan (regular use) | ✗ 4–8 weeks before visible degradation | ✓ Multiple seasons with proper care |
| Sustainability | ✗ Frequent replacement = more waste | ✓ Longer lifespan = less landfill |
How to identify quality swimwear fabric when you are shopping
Not every brand is transparent about what goes into their suits. Here are the questions worth asking, and what the answers tell you.
Is the outer fabric chlorine resistant? Fashion swimwear is rarely chlorine resistant. If a brand does not explicitly state this, assume it is not. Look for brands that name chlorine resistance as a design feature, not an afterthought.
What is the lining made from? This is the question most people never think to ask, and the one that matters most for longevity. If a brand cannot tell you what their lining is made from, that is usually because it is standard nylon and they know it is not a selling point.
Where is the fabric sourced? Country of origin matters for performance textiles. Italian performance fabrics carry a manufacturing standard that is genuinely difficult to replicate, which is why they are used across elite sporting applications globally.
Is it eco-friendly? High-performance fabric and sustainability are not mutually exclusive. JAYD's Italian eco fabric is made from regenerated materials, recycled ocean waste repurposed into a fabric that performs at the highest level. Fewer suit replacements also means less textile waste overall.
For more on why fabric quality affects how long your suit lasts and what you can do to extend its life, read our guide on how to care for your swimwear so it lasts. And if you are looking for a suit built with all of this in mind, browse the full JAYD one piece range or read our guide to choosing a training swimsuit.
The fabric is the foundation. Everything else follows.
Frequently Asked Questions
What fabric is JAYD swimwear made from?
JAYD swimwear is made with a premium Italian performance fabric on the outside and a 100% PBT (polybutylene terephthalate) lining on the inside. The outer fabric is chlorine resistant, colour retaining, and engineered for long-term shape stability. The PBT lining is genuinely chlorine-proof, maintaining its compression and opacity through hundreds of sessions. Together they form a suit built to last multiple seasons of serious use.
Why does JAYD use Italian fabric?
Italy is the global benchmark for high-performance textile manufacturing. Italian performance fabric mills produce technical textiles used in Olympic swimwear and elite sportswear worldwide. The manufacturing standards, quality controls, and material science simply are not replicated at the same level elsewhere. JAYD sources from Italy because it is where the best performance fabric in the world is made.
What is PBT lining and why is it better than nylon?
PBT is a specialised polyester fibre that is genuinely chlorine-proof, unlike standard nylon linings that degrade, sag, and go transparent with pool use. PBT maintains its compression, opacity, and structure through hundreds of training sessions. Most swimwear brands use cheap nylon linings as an afterthought. JAYD uses a 100% PBT lining on every suit because it is the material that actually lasts.
Is JAYD's fabric eco-friendly?
Yes, JAYD's Italian eco fabric is made from regenerated materials including recycled ocean waste and industrial plastics, using less energy and water than virgin fabric production. Beyond the material itself, the durability of JAYD suits means fewer replacements and less textile waste over time. Longevity is sustainability, and it starts with choosing the right fabric from the beginning.
How do I know if a swimsuit is made with quality fabric?
Ask three questions: Is the outer fabric chlorine resistant? What is the lining made from? Where is the fabric sourced? If a brand cannot answer these clearly, that usually tells you everything you need to know. Quality performance swimwear will always be transparent about its fabric because the fabric is its strongest selling point.