These are endless slings in which strands of strong polyester yarn are bound into a rope form and enclosed in a protective sheet.
Due to the use of a flexible rope form, the slings are also capable of snugly fitting to a wide variety of load shapes with little slippage to offer outstanding load stability.
The strength is maintained by the core yarn. If the outer sheath has been damaged and the core yarn becomes visible, the sling has reached its usage limit.