... .FLEX COOL : a highly functional CD-TYPE polyester fiber. 3.Com:53%poly+47%flexcool Men's Wear Series sportswear1.Composition ... of types of high, medium and low-grade tennis rackets, badminton rackets, and tennis, shuttlecocks; every kind of high, medium stringing ... quality, the products have won the awards of tennis and badminton association and appointed as special products used by BOBBY ERTANTO ...