Rungne Magdust is the brand's original chalk blend, built around a 70% chunk and 30% powder formula that sticks without pulling moisture from skin the way a pure powder can. The mix holds up across gym sessions, sport routes, and bouldering problems without needing to swap chalk for different conditions. What Our Gearhead(R) Experts Are Saying:"The chunk-to-powder split works across conditions: the chunks last longer on the wall while the powder coats fast when I need a quick re-chalk between moves."