Quoted from MSV website – The MSV FOCUS-HEX® string is a top rated co-polyester string in hexagonal profile.
It provides great power, excellent control, enhanced spin and improved tension maintenance.
More than 1 million stringings with MSV FOCUS-HEX®. Our bestseller MSV FOCUS-HEX® 1,23mm was awarded String of the Year multiple times by the leading tennis string community (www.stringforum.net). This string was winner of the following poly categories: durability, spin and tension maintenance.
It is the third most rated string ever amongst 2,129 rated strings (status: 21 August 2014; MSV did not perform any kind of promotion activity). Tennis player’s satisfaction scores at an excellent level of above 90% (357 ratings; status: 6 October 2014).
The great characteristics of MSV FOCUS-HEX® is based on a unique material-mix which is the result of long-standing research and development. The string is ideal for players demanding maximum durability with exceptional spin and control.
My opinion : Personally, the 1.10mm version of this string IS the string of my choice for spin and bite. Its biting ability is just incredible in my opinion, once the ball touches the string bed, its immediately caught in the string-bed. The bite feel and topspin is just fantastic. Ball slippages are impossible.
Very nice lively feel and response from this string!
But has a wire-like feel when strung at higher tensions.
Note: Recommended tension for this string is 52 pounds or less
Type : Co-Polyester
Structure : Mono-filament
Shape : Hexagonal
Colour : Sky Blue , Red , Black , Natural
Gauge : 1.10mm , 1.18mm, 1.23mm, 1.27mm