Arborist rope is rope made for tree work: climbing lines that support the climber, and rigging lines that lower cut wood under control.
Climbing lines are sized for friction hitches and mechanical devices and are often sold with a sewn or spliced eye on one end. Rigging lines are larger and stronger because they take the shock of falling limbs. Throw lines and throw weights set the climbing line in the canopy.
Check that the rope diameter matches your hitch cord and hardware, and follow ANSI Z133, the safety standard for arboricultural operations in the United States.