The  X4 poweer silk s a 4 strands feeder braid polyethylene line, built with a
very tight and complex structure that gives the product an extraordinary
compactness and a consequent exceptional roundness in
diameter. 

very fast sink 

The evolution of braided Dyna Tex, specifically the X4,
is even more effective in terms of flexibility and handling, easily
found by simply touching the line with your hands. These characteristics
of flexibility and roundness are critical to a braid that was
created specifically for casting.