GOSEN "UMISHIMA" is a unique technology that blends multiple materials in a monofilament for diverse string characteristics. It's named after islands on the sea, signifying the merging of different elements. The number of "islands" on the "sea" creates different characteristics. The AK Series was initially created in collaboration with and utilized by the professional tennis player Anna Kournikova.
 
AK CONTROL features a 19-island composite structure that provides exceptional softness and control.
 
Material: Original UMISHIMA structured nylon 19-cores and wraps with polyurethane coating
Gauge: 1.30㎜ (16GA.)
Length: 12.2m (40FT.)
Made in Japan
 
Structure and Advantage of UMISHIMA Series