Edelweiss 4mm Cord X 60m - Black. Made with the same precision as dynamic climbing ropes and with diameters ranging from 1mm to 9mm. Made of 100percent Nylon core and Nylon sheath. Item 442969 is a special construction using a dynamic core and is also 100percent Nylon core and Nylon sheath. Package Contents: Edelweiss Accessory Cord