All-around good playing multi-filament. Looks goods, strings effortlessly, good durability. May be a bit too stiff and crispy feeling for some people, but perhaps dropping tension a few pounds would cure that.
Very playable string, easy on the elbow, great feel and power. Not very durable on my Wilson Steam 99s but I don't think is the string fault!! not that many strings last that long on this racquet!!