While SPF and UPF both relate to sun protection, they’re not interchangeable. Learning the difference between SPF (Sun Protection Factor) and UPF (Ultraviolet Protection Factor) can make a big difference on how you protect your skin–and long-term health.
Let’s get into it.
SPF = Sun protection from skincare products (like sunscreen)
UPF = Sun protection from clothing and fabrics
Think of SPF as a shield for your skin that you apply and rub on, while UPF is the UV protection that your clothing provides.
Why Sun Protection Matters
Let’s talk about why sun protection is such a big deal in the first place. According to the America Academy of Dermatology, an estimated 1 in 5 Americans will develop skin cancer in their lifetime. Every time your skin is exposed to ultraviolet (UV) radiation it takes a hit. UV rays damage the DNA in skin cells, which can lead to premature aging, sunburns, and in more serious cases, skin cancer.
What Does SPF Mean?
SPF = Sun Protection Factor
SPF is a metric used in skincare products like:
- Sunscreen
- Tinted moisturizers with SPF
- SPF lip balms
The SPF number indicates how much longer you can stay in the sun before getting burned, compared to unprotected skin. For example:
- SPF 30 = 30x longer before burning
- SPF 50 = blocks 98% of UVB rays
- SPF 100 = blocks 99%, but no sunscreen blocks 100%
Broad-Spectrum = Critical
Not all sunscreens protect equally. Only broad-spectrum SPF shields you from both UVB (burning) and UVA (aging) rays. Always look for this label when shopping for sunscreen.
Things to Know About SPF
- You must reapply every two hours (or after swimming or sweating).
- Amount matters: You need about a shot-glass full (1 oz) to cover your whole body.
- SPF isn’t additive: Wearing SPF 30 moisturizer and SPF 50 sunscreen doesn’t give you SPF 80.
What Does UPF Mean?
UPF=Ultraviolet Protection Factor
UPF is a rating given to fabrics to indicate how much UV radiation the clothing blocks. A higher UPF rating means better protection.
Here’s a break down:
- UPF 15: Blocks 93.3% of UV rays
- UPF 30: Blocks 96.7% of UV rays
- UPF 50: Blocks 98% of UV rays
UPF clothing is a smart way to stay protected without having to constantly reapply sunscreen. It’s especially helpful for long days outside, water sports, and for kids who are always on the move.
Explore our full Sun Protection Collection.
SPF vs. UPF: Side-by-Side Comparison
Here’s a breakdown to help you see the key differences between SPF and UPF protection.
Feature |
SPF |
UPF |
|
Used For |
Sunscreen, skincare products |
Clothing, hats, accessories |
|
Protects Against |
UVB (and UVA with broad-spectrum) |
UVA and UVB |
|
How It Works |
Chemical or physical barrier on skin |
Physical barrier that blocks/absorbs UV rays |
|
Application |
Must be applied and reapplied |
Built into the fabric |
|
Water Resistance |
Some formulas are water-resistant |
Depends on fabric and weave |
|
Needs Reapplication |
Yes |
No |
|
Protection Duration |
Temporary |
Lasts as long as garment is intact |
UPF vs. SPF: Which One Should You Use?
Trick question. You need both.
- SPF skincare is essential for exposed skin: face, ears, neck, and hands.
- UPF-rated apparel gives you consistent, long-term protection—without reapplying.
Combining the two offers complete UV protection, especially for those who hike, fish, paddle, or ski at high altitudes where UV intensity is stronger.
How to Choose the Best UPF Clothing
Choosing sun protection clothing isn’t just about sleeves and fabric—it’s about tested performance.
Look for:
- UPF 50+ rating
- Tightly woven fabrics
- Breathable, moisture-wicking material for hot climates
- Coverage (long sleeves, hoods)
- Durability when wet or stretched
Check out our Brackish sun shirt collection that are made to get wet and dry fast—perfect for fishing, paddle boarding, and hiking.
How to Choose the Right SPF Skincare
Look for:
- SPF 30 or higher
- Broad-spectrum protection
- Water-resistant formulas
- Non-comedogenic if you have acne-prone skin
- Mineral SPF (zinc oxide, titanium dioxide) if you prefer a physical blocker
Avoid:
- Expired products
- Overly greasy formulas if wearing makeup
- Spray sunscreen in windy areas (it doesn’t coat evenly)
SPF and UPF Are Better Together
When it comes to protecting your skin from sun damage, the SPF vs. UPF debate isn’t about choosing one over the other—it’s about using both together.
- SPF guards your skin directly with topicals
- UPF acts as a wearable barrier you don’t have to think about all day
Stay smart. Stay sun-safe. And keep doing what you love—without burning out.
