Luxilon claim that their M2 Pro string combines all advantages of a multifilament and a monofilament string into a single string. Luxilon state that this is the  first string to provides variable characteristics - control on hard strokes, comfort on touch strokes. Providing variable flex, M2 Pro offers more control on powerful shots, while supplying more comfort and feel on softer shots.
 
• Gauge: 16L / 1.25mm
• Length: 12.2m
• Construction: Multifilament polyester
• Colour: Pearl