When people talk about SPF, many think exclusively of sunscreen. In reality, effective skin protection from UV rays comes from a combination of several tools. Understanding the difference between SPF and UPF is crucial to reducing the risk of premature aging, spots, sun damage, and other damage caused by exposure to UVA and UVB rays.
What is SPF?
SPF (Sun Protection Factor) indicates the level of protection a sunscreen offers primarily against UVB rays, which are responsible for sunburn. For example, a cream with SPF 50 filters approximately 98% of UVB rays if applied correctly.
However, the effectiveness of SPF depends on several factors:
- amount of product applied;
- frequency of reapplication;
- sweat, water, and friction;
- prolonged sun exposure.
For this reason, sunscreen remains indispensable on exposed areas but requires attention throughout the day.
What is UPF?
UPF (Ultraviolet Protection Factor) measures a fabric's ability to block UVA and UVB rays. Unlike SPF, it concerns sun-protective clothing.
A garment certified UPF 50+ allows less than 2% of ultraviolet radiation to pass through, offering constant photoprotection as long as it is worn, without the need for reapplication.
Therefore, UPF clothing represents a practical solution for those who spend many hours outdoors, play sports, travel, or wish to limit the prevention of sun damage on covered areas.
SPF and UPF: why use them together
SPF and UPF are not just alternatives, but complementary.
For complete skin protection, it is advisable to:
- apply broad-spectrum sunscreen to exposed areas;
- wear UPF 50+ certified clothing on covered areas;
- limit exposure during the middle of the day.
This approach helps to reduce the risk of aging, spots, photo-damage and, in the long term, even some skin cancers.
The best protection is the one you can maintain
SPF remains a fundamental tool in daily sun protection, but it can be even more effective if combined with UPF clothing. Together they help protect the skin from UV rays and prevent sun damage over time.
If you're looking for a practical way to supplement your sun protection routine, discover the collection of UPF 50+ clothing from nule, designed to offer comfort, style, and protection during any outdoor activity.
