High quality fleece lining, bomber ripstop nylon and rigid nylon webbing rim hold up to abuse Built-in drawcord closure secures chalk; sturdy brush holder with 2 suspender elastics Zip pocket on back stashes valuables and is large enough for most smartphones Adjustable belt has a lock buckle with integrated emergency whistle Medium/large volume and capacity Lightly used, and ready for climbing - comes filled with chalk and a Metolius refillable chalk sock