Frequently Asked Questions

A Marathon Sheath is a Sterling Innovation. This sheath uses heavier denier nylon than any other dynamic rope on the market. We do this to enhance the rope's durability and longevity.

DryCore is our unique nylon core construction that reduces yarn on yarn abrasion of wet nylon fibers, helping to maintain the original strength and elongation characteristics of our ropes. Only Sterling ropes have DryCore. Please note that DryCore does not guarantee you rope will stay dry, but that when the rope is wet the fibers will maintain more of their strength and stretch.

BiPattern ropes are a pattern shift in the middle of the rope. Neither the color nor yarns change. BiColors are produced by changing the yarns to a completely different color yarn at the middle of the rope by using an air splice technique.

Those fuzzy bumpy spots are Air Splices. An air splice is the joining of two yarn ends by means of high-pressure air forced around the ends causing them to entwine and snarl together. Air splices are essential to join strands into usable lengths. From a life safety perspective two yarns air spliced together test out to be 50% stronger than continuous straight fibers because they have twice as much yarn in the section that is air spliced.