What if a cycling jersey has no UPF rating — is that a dealbreaker?

Not necessarily, but you should know what you're getting. A jersey with no UPF rating hasn't been tested or certified for sun protection, and many lightweight cycling fabrics — especially thin, breathable meshes — let a surprising amount of UV radiation through. This is especially true when the fabric stretches across your shoulders and back while you're in a riding position.\n\nFor short commutes, early morning rides, or overcast days, a non-rated jersey is perfectly fine. Many riders simply apply sunscreen underneath and move on. Just don't assume the fabric itself is shielding you — it may not be.\n\nThe real risk shows up on long, sunny rides or at altitude, where UV exposure intensifies. If you burn easily or regularly ride for several hours in direct sun, a UPF-rated jersey is a smarter choice. Otherwise, treat a non-rated jersey as having minimal protection and plan your sunscreen accordingly.