The band is a bit big for thin arms,
Verified Purchase(What is this?)
This review is from: Belkin Neoprene Deluxe Armband for iPhone 4/4S - Black and Yellow (Accessory)
Overall, the product is reasonable, but the arm band won't adjust small enough for the trimmer female figure, which is how many regular runners are built.
Also, the clear plastic front does fog up with some stuff (not condensation) and it is quite hard to clean to make it transparent again.
My Wife bought a better one from Decathlon for a tenner!
For me, it does fit and I can put up with the occasional clean.
I will say that when I use it going running, everything else about it is good.