# Rash Guard vs Swim Shirt: Key Differences

## What Is a Rash Guard
Rash guards are tight-fitting performance shirts made of stretchable fabrics that protect against sunburn, abrasions, and jellyfish stings. They are ideal for surfing, diving, and paddle sports.

## What Is a Swim Shirt
Swim shirts are looser-fitting garments designed primarily for sun protection. They offer UPF coverage but less compression and mobility.

## Key Differences
- **Fit:** Rash guards are snug; swim shirts are loose  
- **Fabric:** Rash guards often use spandex/polyester; swim shirts use polyester blends  
- **Protection:** Rash guards protect from abrasion; swim shirts protect mainly from UV  
- **Performance:** Rash guards enhance movement; swim shirts focus on comfort  

## Which One Should You Choose
- Surfing or high-movement sports: Rash guard  
- Casual swimming or sun protection: Swim shirt  

## Conclusion
Selecting the right shirt ensures protection, comfort, and performance for your water activity.