Great Chalk Bag
I bought this bag for my wife and I to share while learning to rock climb. Overall this is a great bag: it holds a chalk sock with no problem and is able to draw string close when not in use. It has solid construction throughout, I expect this bag to last. I have only two complaints about this bag: The C40 is too small for my hands to comfortably fit in and apply chalk, and the toothbrush holder is not large enough to hold any toothbrush we had in the house. When the time comes for me to by my own bag I will definitely get the same bag but in a larger size to fit my hands.

Good Chalk Bag at a good price
This is a very well built chalk bag. Arc'teryx uses a downward sloping plastic ring to ensure that the opening of the bag is conveniently placed. It's easy to get your hands in and out of the bag without them getting stuck in the bag. While this bag is great for gym use, or bouldering use, I would not recommend it for big wall, based on it's size. Great for shorter routes, but go with a bigger size on longer routes. Buy this, your won't be disappointed.

Good chalk bag
Regarding the design, I like this chalk bag very much. Easy and comfortable to carry. I share this chalk bag with my wife. However, I should have bought a larger size like 80 since this chalk bag is a little bit too small for me; I cannot smoothly apply chalk especially when I put a new chalk ball. I would recommend this product to people having small hands.

Good Sturdy Chalk Bag
This chalk bag is very well made and comes at a pretty good price. The included belt is very nice though it can't be removed save by knife. The bag stays open well and doesn't spill hardly at all. It is shallower than I thought, but an average size hand fits in it well. My only complaint is the brush holder is tiny, I don't know if it needs to be broken in but I haven't found a brush I could fit in it yet. Other than that, a great bag!