UPF stands for Ultraviolet Protection Factor. UPF-rated fabric is tested to block a specific percentage of UV rays, similar to how SPF works for sunscreen. UPF 50 fabric blocks at least 98% of UV radiation, providing excellent sun protection for covered skin. 

Yes. UPF-rated clothing is an effective and convenient form of sun protection. Unlike sunscreen, UPF protection doesn't wash off, sweat off, or need to be reapplied. It provides consistent protection as long as the fabric is worn. 

Yes. UPF leggings are an excellent choice for hiking because they protect your legs from sun exposure during extended outdoor activity where reapplying sunscreen to legs is inconvenient. The stretch fabric also provides full range of motion on the trail. 

Yes. UPF fabric maintains its protection when wet, making it suitable for water-based activities like paddleboarding, kayaking, and beach swimming where sun exposure is high and sunscreen can wash off. 

Not necessarily. Halara's UPF leggings are designed to be lightweight and breathable for outdoor use. The UPF property comes from the fabric weave density, not from heavy coating or additional layers, so they can be as light and comfortable as regular performance leggings. 

Several brands produce UPF-rated clothing, and quality depends on the UPF rating, fabric weight, and durability of the protection through washing. Halara's UPF leggings are designed for active outdoor use with UV-blocking fabric that maintains its protection through repeated washing and wear. For reference, UPF 50 blocks over 98 percent of UV rays, while UPF 30 blocks approximately 97 percent. Look for the specific UPF rating in product descriptions when comparing options.