Perfect Arm Sleeves!
These things are super comfortable to wear for long distances. My bicep is 14" so I wasn't sure to go with the medium or large sleeves. I opted to try the medium size but ended up having to go with the large. They keep my arms cool while keeping the sun off them. Pockets can hold a lot. Not that I'd necessarily recommend it but I can easily fit 4 Gu's in the forearm pocket and 3 more in the upper pocket if I wanted.