Modern swimsuits are primarily made from synthetic materials that combine durability with stretch and water resistance. The most common materials are:
- Nylon/Spandex Blend
- Typically 80% nylon and 20% spandex (also called Lycra or elastane)1
- Provides softness, stretch, and quick-drying properties
- Popular in fashion swimwear
- Polyester/Spandex Blend
- More chlorine-resistant than nylon
- Better color retention
- Preferred for competitive swimming2
- PBT (Polybutylene Terephthalate)
- A specialized polyester that resists chlorine
- Used in high-performance swimwear
- Maintains shape over time3
Key qualities of modern swimsuit materials:
- Quick-drying
- UV resistant
- Chlorine resistant
- Four-way stretch
- Shape retention
- Water repellent
Natural materials like cotton are avoided because they absorb water, become heavy when wet, and lose shape