According to Head Gear, it is the first string to blend a special polymer core with an outer wrap of Dupont micro fibers. Comp Pro is available in 16 and 17 gauge 40' coils in white. The diameter ranged from 1.29 mm to 1.31 mm. Its slightly slick coating allows for smooth cross string installation. With over 40' of string, there is plenty of string for most racquets.
Knots tie easily and cinch up nicely without slipping.
Comp Pro is a firm playing string, in spite of its multifilament outer wraps. In fact, it may be due to these Dupont micro fibers that Comp Pro retains its tension. Some fraying was noticeable after about 8 hours of play, something we expected from the multifilament wraps. This didn't adversely affect playability. While not stiff, it is a firm string and will appeal to players who prefer a control-oriented, rather than power string.