Chalk Line Str8 Jacket Core was specifically developed for the extreme
punishment gyms inflict on rope. Whether you have a small gym or big
gym the Chalk Line can take the constant falls, and belays.
Jacket Core allows the Chalk Line to hold its shape and keep the cover
and core in balance which virtually eliminates Sheath Slippage. This will
reduce flat spots and help maintain the performance of the over all rope.
The Chalk Line will provide a safe easy belay through a variety of devices
while still maintaining its shape.