It's been a while since I've practiced parkour and I want to start practicing again, the problem is that I've lost completely my capacity to hold a good grip. I've never used chalk to practice, but when I watched a video of the "Human Monkey" I noticed that he had on his hands some kind of powder and a bag hanging from his belt. So, I was thinking that I can use chalk to keep a good grip, at least until I get back in shape.
Where can I put the chalk while practicing parkour? is there some specialized equipment for that? or would just a small fanny pack do the job?