The Ultimate Fabric Guide

At Phayon Industries Limited, we don’t  just manufacture swimwear; we engineer it. We know that the magic of a great swimsuit lies not just in the design, but in the fabric composition.

If you’ve ever looked at a garment tag and wondered what the difference is between 85% Polyester / 15% Spandex and 88% Nylon / 12% Spandex, you are not alone. As a leading garment manufacturer, we want to pull back the curtain and explain exactly how these two high-performance fabrics differ—specifically regarding durability, feel, and most importantly, UPF (Ultraviolet Protection Factor) .

Here is the professional breakdown.

1. The Foundation: The "Stretch" Factor

Before diving into the fibers, let’s look at the numbers.

• The 15% Spandex (Elastane): Both fabrics contain a high percentage of Spandex (the industry term for elastane). This is the "workhorse" that provides the 4-way stretch necessary for swimwear. It allows the suit to hug the body perfectly without restricting movement, whether you are swimming laps or lounging by the pool.

• The Difference: The remaining percentage (85 or 88) is the "face" fiber—the one that determines texture, color retention, and resistance to the elements.

  
  

 2. The Contender: 85/15 Polyester/Spandex

Best for: Longevity, chlorine resistance, and high-impact activities.

If you are looking for a swimsuit that will survive 50+ trips to the chlorinated pool or intense saltwater exposure, 85/15 Polyester is your champion.

• Chlorine Resistance: Polyester is inherently hydrophobic (water-repellent). It does not absorb water easily, which means it is highly resistant to chlorine damage. Unlike other fabrics that break down in pools, 85/15 polyester maintains its shape and elasticity for seasons.

• Color Fastness: This fabric holds color exceptionally well. You will rarely see fading or "bleeding" with high-quality polyester blends.

• Structure: It has a slightly firmer hand-feel (stiffer texture). It offers more compression and holds its shape like iron.

• UV Protection: Polyester naturally has a tight molecular structure. While most high-quality fabrics are tested for UPF, 85/15 polyester typically offers a UPF rating of 50+, blocking 98% of UVA/UVB rays.

  
  

  3. The Contender: 88/12 Nylon/Spandex

• Best for: Comfort, softness, and vibrant prints.

• If you prioritize a "butter-soft" feel against the skin and want the most vibrant, photographic-quality prints, 88/12 Nylon is the premium choice.

• Softness: Nylon is known for its luxurious, silky texture. It drapes beautifully on the body and feels like a second skin.

• Printability: Nylon is the superior canvas for digital printing. If you see intricate designs, ombre fades, or neon brights, they are almost always printed on a nylon/spandex base because the dye absorbs deeply without losing vibrancy.

• Breathability: While both are quick-dry, Nylon offers slightly better breathability, making it very comfortable for all-day wear in tropical climates.

• Durability Warning: Nylon is durable, but it is less resistant to chlorine and oils than polyester. Over time (often 3-6 months of heavy pool use), the elastic fibers may degrade faster than polyester blends.

  
  

• 4. The Ultimate Showdown: Sun Protection (UPF)

• This is often the most important question for our customers. Which fabric offers better sun protection?

• The truth is, both 85/15 Polyester and 88/12 Nylon are capable of achieving a UPF 50+ rating (the highest standard) when manufactured correctly.

• However, here is the nuance regarding how they achieve it:

• 85/15 Polyester: Wins for wet protection. Polyester does not absorb water. When a fabric gets wet, the fibers expand, which can actually reduce UV transmission. Since polyester stays drier and the fibers don't swell with water weight, the UPF protection remains stable even when you are diving into the waves.

• 88/12 Nylon: Provides excellent UPF protection, but relies heavily on the tightness of the knit. At Phayon Industries, we ensure our Nylon blends are knitted with a high-density structure specifically to block UV rays. Note: If a Nylon suit is stretched too thin (i.e., sized too small), the UPF efficacy decreases slightly.

• The Verdict: For maximum sun safety, especially in high-exposure environments (beaches, hiking), 85/15 Polyester offers marginally better stability when wet.

  5. How to Choose: A Quick Guide

• Feature	85/15 Polyester/Spandex	88/12 Nylon/Spandex
  Feel	Firm, compressive, structured	Silky, soft, "naked" feel
  Best Use	Lap swimming, water sports, frequent chlorine exposure	Resort wear, beach vacations, fashion-forward designs
  Color/Print	Solid colors; holds color well	Best for vibrant, intricate digital prints
  UV Protection	UPF 50+ (Stable wet or dry)	UPF 50+ (Best when fabric is dry/fitted)
  Longevity	Excellent (Years of use)	Very Good (Seasons of use)

Conclusion

At Phayon Industries Limited, we utilize both 85/15 Polyester and 88/12 Nylon in our independent collection because they serve different purposes.

• If you are a competitive swimmer or looking for a bikini that will survive a full summer of pool parties without fading, the 85/15 Polyester blend is your go-to.

• If you are looking for a luxurious, soft-touch bikini with high-end fashion prints and don’t plan on living in a chlorinated pool, the 88/12 Nylon blend offers superior comfort and aesthetics.

Both fabrics are engineered to meet the highest standards of UV protection (UPF 50+), ensuring that your skin is as protected as your style.

Explore our latest collection to feel the difference for yourself. Whether you choose the structured durability of Polyester or the silky luxury of Nylon, you are wearing the quality of Phayon Industries.

Have questions about fabric care or sizing? Contact our support team—we build these suits from the thread up, so we know them best.