The Imori has the diameter of a climbing rope but the touch of a rigging line. It is quite soft and offers great handling characteristics from the get-go – thanks to an extraordinary construction. Yale Cordage has incorporated a new type of textured fiber woven into the sheath strands of regular and softer polyester. The black fiber, called AirJet (AJT) is somehow harder, providing bulk and a better grip. This unique blend allows the fibers to be exposed on both the outer sheath and also on the inside of the sheath providing more friction to the inner core which helps to minimize excessive elongation while providing an unsurpassed grip for the climber. 24 strand.