KingCord Smooth Braid Polypropylene, also known as Derby Rope, is great for outdoor recreation and farm/ranch use. Its lock-stitch construction makes for a firm, round rope that will keep its shape when stretched or under load. It works very well in blocks and pulleys. It is soft, pliable, and easy on the hands as well as being rot and mildew resistant. Store wet or dry. For extended life, store away from direct sunlight. Do not use for overhead lifting. Never exceed the Safe Working Load (SWL).

Polypropylene is a general-purpose synthetic rope.
It is inexpensive, lightweight, and does not absorb water, which allows the rope to float and makes it particularly useful for marine applications and pools.
It has medium stretch characteristics that allow the rope to slowly stretch.
Ultraviolet (UV) light inhibitors have been added to prevent degradation.
Relative to other synthetic ropes, polypropylene does not hold knots well and has limited abrasion resistance.