Both UPF (Ultraviolet Protection Factor) and UV protection refer to shielding against the sun’s ultraviolet (UV) rays, but they apply to different materials:
1️⃣ UPF (Ultraviolet Protection Factor) – For Clothing & Fabrics
- Measures how much UV radiation penetrates fabric and reaches your skin.
- A UPF rating (e.g., UPF 50) means that only 1/50th (or 2%) of UV rays pass through the fabric.
- Higher UPF = More protection (UPF 50+ is considered excellent).
- Found in sun-protective clothing, fishing shirts, and rash guards.
Example: A shirt with UPF 50 blocks 98% of UV rays.
2️⃣ UV Protection – For Sunscreen, Glasses & Skincare
- UV protection refers to blocking UVA & UVB rays from the skin or eyes.
- Found in sunscreen (SPF), sunglasses, and window films.
- SPF (Sun Protection Factor) is used to rate lotions, creams, and sprays for skin protection.
- UV 400 Sunglasses block 100% of harmful UVA & UVB rays.
Example: SPF 30 sunscreen allows 1/30th of UV rays to reach your skin and is meant for direct skin application, not clothing.
🔹 Key Takeaways:
- UPF = Used for clothing (protects against UV rays).
- UV Protection = Found in sunscreen, sunglasses, and skincare (blocks UVA & UVB rays).