Endless round slings  are the most basic and versatile type of round sling.They are made of load-bearing core and protective jacket,which provides a layer of protection over the core polyester loops,and the its abrasion will not reduce capacity.And this jacket is color coded by the capacity and also has black strips for better knowlage of which sling to be used in particular applications.The design of endless type is to extend its working life,because the point of contact can rotated with each use,and thus reduce continuously pressure over one fixed point.