When you think about what makes a great swimsuit, you probably consider the fit, the feel, and the style. But what about sun protection? At Siren + Sage, we believe your swimwear should work just as hard as your SPF—and look just as good doing it. That’s why all of our suits are made with luxurious Italian fabric featuring UPF 50+ protection, for a fashionable line of defense against the sun’s rays. If you’re shopping for stylish, supportive swimwear that goes beyond the basics, this is your sign.

Here’s what that really means—and why it’s a game changer.

What Is UPF 50+ Fabric?

UPF stands for Ultraviolet Protection Factor, and it’s the fabric equivalent of SPF. While SPF (Sun Protection Factor) measures how well a sunscreen protects your skin from UVB rays, UPF measures how well a fabric blocks both UVA and UVB rays.

UPF 50+ is the gold standard. It means that only 1/50th of the sun’s UV radiation can penetrate the fabric, effectively blocking 98 percent of harmful rays. The result? Better skin protection, especially in areas that are often forgotten—or just too hard to reach—when applying sunscreen.

Why UPF 50+ Swim Fabric Matters

Swimwear isn’t just about style—it’s about skin safety, too. Sun exposure is one of the leading causes of premature aging and skin damage, and the right fabric can go a long way in shielding your skin.

Here’s what sets UPF swimwear apart:

• All-day sun protection: UPF fabric helps guard against UV exposure even after you’ve been in the water or sweating, unlike sunscreen, which needs to be reapplied frequently.

• No missed spots: While you might forget to reapply sunscreen to hard-to-reach areas, your UPF 50+ swimsuit has you covered (literally).

• Long-term skin health: Consistent sun protection reduces your risk of sun damage, dark spots, and even skin cancer.

The Fabric Behind Every Siren + Sage Suit

What sets Siren + Sage apart isn’t just the materials we use—it’s how we use them. Our suits are designed to offer structure, support, and style—from our bra-sized Balconette swimwear to our innovative OverKinis, which layer on shaping, smoothing, and sun protection.

Whether you're lounging by the pool or chasing your kids across the sand, our supportive swimwear for large busts is engineered to protect your skin while flattering your shape. And because the UPF 50+ is built into the fabric itself, you don’t have to worry about the protection fading over time.

Style That’s Got You Covered

With the rise in awareness around sun damage and skin cancer, more and more women are prioritizing sun-protective swimwear, but that doesn’t mean sacrificing on style.

Our signature silhouettes are crafted with both in mind. You’ll find:

• Sleek, sculpted one-pieces

• Convertible bikini tops with underwire support for full bust swimwear needs

• Layerable styles like the OverKini for added shaping and coverage

• All made in UPF 50+ Italian fabric that looks as good as it feels

Not all swimwear is created equal. At Siren + Sage, we’ve made it our mission to combine elevated style with purposeful performance—because feeling confident in your suit should also mean feeling protected. Whether you're shopping for large bust swimwear, cup-sized swimwear, or swimwear that supports, flatters, and shields UV rays, we've got you covered.

Explore the collection and discover the power of UPF 50+ swim.