Kernmantle rope is a type of rope that is commonly used in SRT climbing systems. It is made from a braided outer sheath and a kern (core) that is made from twisted strands of fiber. The kern provides strength and the sheath protects the kern from abrasion. Kernmantle rope is typically made from nylon or polyester, but can also be made from other materials such as Kevlar or polypropylene.

Kernmantle rope has several advantages over other types of rope. It is lighter weight, has greater strength, and is more elastic than other ropes. This makes it ideal for use in SRT climbing systems where weight and strength are important factors. Kernmantle rope is also less likely to kink or coil than other types of rope, making it easier to handle and use.