Black Diamond's 'Pure Gold' booster was specially designed to improve chalk. It contains a concentrated amount of Upsalite, a new scientifically developed form of magnesium carbonate that absorbs 30% more moisture than other compounds. With these 5 grams you can spice up other chalk and improve the grip. Either mix individually with the loose chalk you prefer to use (we recommend a ratio of 1 to 10) or apply directly as the first layer before sending,
