from the Manufacturer:

Evah Pirazzi strings have a core made from a modern synthetic multifilament fibre.
-Very intensive and powerful, excellent for Soloists
-Outstanding playability and exceptional response at any of the dynamic levels
-Complex sound, rich with overtones based on a brilliant core sound
-Enormous projection

Evah Pirazzi strings translate every minute impulse from bow and fingers into beautiful sounds.
-Expressive, great nuances
-Enormous dynamic range
-Outstanding tuning stability
-Absolutely insensitive to variations in temperature and humidity
& also suitable for electric or electrically-amplified violins!