When you see “UPF” on a clothing label, it’s easy to assume you’re covered. But not all UPF clothing provides the same level of sun protection, and the number next to those three letters matters. At the top of the scale is UPF 50+, the highest UPF rating category for sun-protective apparel.
Understanding that rating can help you make a more informed choice about what you wear outside. And while UPF is important, it isn’t the only thing worth considering when choosing clothing for long days in the sun.
What Does a UPF Rating Mean?
UPF stands for Ultraviolet Protection Factor and measures how much UVA and UVB radiation can penetrate a fabric and reach your skin. Simply being labeled UPF doesn’t mean a garment offers the highest level of protection, which is why checking the actual rating matters.
UPF ratings generally fall into three protection categories: UPF 15–24 is considered good protection, UPF 25–39 very good protection, and UPF 40–50+ excellent protection. At UPF 50, only about 1/50th of UV radiation passes through the fabric, meaning approximately 98% is blocked.
Is UPF 50+ the Highest UPF Rating?
Yes. UPF 50+ represents the highest UPF rating category for sun-protective clothing. A UPF 50 fabric blocks approximately 98% of UVA and UVB radiation, allowing only about 2% to pass through.
For anyone who spends hours outdoors— Ibkul’s sun protective clothes will rescue your skin from harsh UV rays. Whether you need uv protective golf clothes, sun protective tennis clothes, comfortable travelling outfits, or simply an outfit to enjoy a sunny day—Ibkul has it all.
Why Does UPF Stop at 50+?
Here’s something many people don’t realize: fabrics can test higher than UPF 50. Once a fabric reaches the top UPF rating category, however, it may be labeled UPF 50+ rather than displaying increasingly higher numbers.
That little plus sign matters. Rather than being decorative marketing language, it indicates that the fabric has reached the highest category within the UPF rating system.
Sun Protection Is Only Half the Story
A high UPF rating is important, but it isn’t the only thing that makes a great sun-protective shirt. If you’re going to cover up while golfing, playing tennis, traveling, or spending hours outdoors, how the fabric feels and performs matters too. A shirt can offer excellent UV protection, but if it feels heavy, hot, or uncomfortable, you may not want to wear it on the days when you need it most.
That’s why it’s worth looking for lightweight, breathable fabric that wicks moisture, dries quickly, and stretches comfortably as you move. IBKÜL Iceƒil® apparel combines UPF 50+ sun protection with patented cooling technology engineered to lower skin temperature by up to 5°F, along with moisture-wicking, quick-drying performance and four-way stretch.
What Should You Look for in UPF Clothing?
Start with the number and look for UPF 50+ for the highest category of UPF protection. Then consider everything else you want your clothing to do while you’re outside: coverage, fabric weight, breathability, moisture management, stretch, cooling performance, and overall comfort.
Two shirts can both be designed for the sun and still feel very different after hours outside. Not all UPF clothing is created equal, so know your UPF—and know what else your clothing can do.
