Not all constructions are created equal. Every string in the Rx Series is uniquely constructed for that particular set. This "Focused Set Design" concept helps achieve all the elements of a perfectly balanced set such as tone, feel, vibrato, and tension. More flexible and lighter in tension compared to SN & M Series, players will find the RX Series are more comfortable to play on any style bass. The RX Series is just the remedy your bass has been calling for! Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness.