The Arc'teryx C80 Chalk Bag is a large chalk bag for people with bigger hands. If your paws Are giant, then give the C40 to your tiny handed friend and go with the C80 for yourself. The larger opening won't cause your hand to get trapped inside with all the chalk, leaving you hanging one-handed on the wall. Since this one is bigger, Arc'teryx found room to Fit an external zipper pocket on the bag, where you should definitely put a bunch of candy inside. When packing up, pull the drawcord tight so chalk won't escape on the way home. Features of the Arcteryx C80 Chalk Bag Drawcord closure Injection molded belt attachment / slider Bottle opener Brush holder Waist belt External security pocket Activity: Rock Climbing Burly double weave four-way stretch Schoeller dynamic Available in two sizes to Fit every hand-dimension and personal chalk consumption needs