DR Strings Dragon Skin+ Coated Bass Guitar Strings - 045-105 

Dragon Skin+™ strings sound huge, are easy to play, and have outstanding endurance.  Dragon Skin+ upgrades both the core and the wrap wires to be exceptionally musical, balanced, and loud.  Accurate Core Technology™ creates grooves on the core to cradle the wrap wire, allowing the strings to ring out to their full potential.
Designed to feel and sound better, 
Dragon Skin+ is unlike anything out there.
The difference is real.