Andrew A wrote a review of Arc'teryx Aperture Chalk Bag - Large on April 14, 2014
Familiarity: I've used it several times
I got this chalkbag so my coat/gear closet wasn't always covered in a white dust. The bag keeps it clean and then some. The closure system is very secure. The capacity isn't huge, but it's more than enough for your average sport/trad climber I would say. One downside is the floppy brush holder. My brush tends to fall out when the bag is closed up. Overall it's awesome if you want something clean and cool.