Innovation Double Bass Strings have a unique, non-metallic core which provide a gut-like tone without the cost or maintenance of gut upright bass strings. They hold their pitch well in climate and temperature changes, and most of their strings are equally suited for pizzicato (plucking) and arco (bowing). Innovation Psychobilly Double Bass Strings are designed specifically for Psychobilly players; they’re basically similar to the popular SilverSlaps and GoldenSlaps. However, they have a bigger diameter and a little more tension, which is better suited to someone actually playing the psychobilly style; with the higher speed and aggressiveness, a bit more tension is needed. (For “straight rockabilly,” the slap is more of a passing accent – and the GoldenSlaps or SilverSlaps might be a better choice.) For a “stiffer” feel — with a thinner diameter — at a similar tension, the Rockabilly strings might be a good option. The Psychobillies are thicker-gauged strings with low tension and a clear outer winding, and they have a big fat sound with good sustain. The tone, when used for Psycho-slap, is very aggressive. These are strings that want to be heard! They play similar to the other Innovation (and most other nylon/synthetic wrapped) strings. The outer winding is softer than metal, so they shouldn’t be too abrasive on your fingers, and they’re easy enough to get a grip on – even with sweaty fingers. They’re actually quite useful for “straight pizz” tones as well. Some players have even suggested that – with their easy pizz play and bigger sound – these strings would be nicely suited for jump swing and blues, where getting a decent volume is an issue.