Instead of having a bulky belt for a chalk bag the Mammut Ophir Chalk Bag attaches to Mammut's Ophir harness so you can trim down your waist a bit and have a cleaner better organized harness. If you don't have an Ophir harness (yet) then this bag works just as well as most chalk bags with an included large waist belt that slides through two suspension points for a secure fit. Mammut made it out of Nylon Dragon for extreme durability and resistance to abrasion and the thick fleece lining is sure to give you all the chalk you need for a dry secure grip on holds. The drawcord closure keeps it tightly closed so chalk doesn't snow down on your belayer. A handy brush holder makes it easy for you to clean up any over-chalked hold and the pocket stores your tape so you don't have to finish the rest of multi-pitches with torn-up fingers for lack of protection.