These soft cloth bags are filled with a super absorbent blend of thirsty kiln dried hardwood powder. Similar to resin bags used by baseball pitchers, they take the moisture from your hands and golf discs without leaving a residue. They are great and a must have to use during rainy or humid conditions. Twelve world champion disc golfers and many top pros agree. Pat the bag on hands or equipment and wipe off the excess for a natural no slip grip!