For professional and advanced players. Hypo-allergenic. Made from a synthetic hydrocarbon resin compound that substantially improves the properties of rosin producing a clear string response. The hydrophobic material resists absorption of moisture making it unaffected by humidity, keeping its tack or effectiveness over time. Non-corrosive to instrument varnish.

Please note that orders totaling less than $30 are no longer eligible for return. We appreciate your understanding!