I bought the Pearl Izumi Sun Sleeves after seeing them in a magazine. The idea is that they provide UPF 40+ sun protection and help to keep you cool. I’ve worn them twice on long (5+ hour) bike rides and love them! I don’t have to put sunscreen on my arms and they do seem to keep me cooler.
One thing I have not figured out is how to wear them properly. What I mean is that one is for the left arm and the other is for the right arm, but I don’t see a difference.
Also, they come in different sizes based on arm length and girth. I bought the medium size and they seem a tad too long, even after one washing. I have a feeling that the small size would be too small though.
I’m still trying to figure out how to put them on in transition without losing a lot of time. Rolling them up first doesn’t help at all.
In the end, I think it’s the best $20 I have ever spent.
Pros: Inexpensive, sun protection, keeps you cooler.
Cons: People who don’t know what they are think you look dorky.