Donn writes – “For you makers out there who also enjoy rock climbing, this document will attempt to show you how to make your own chalk bag for only a few dollars. A chalk bag is a small satchel containing chalk and is used for removing moisture from your hands while rock climbing. It’s usually attached to you…either on the back of your climbing harness or clipped to your belt loop with a carabiner. When your hands get too sweaty while climbing, you reach around and dip your hand into your chalk bag, getting it all chalky, which dries it out.” Link.
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