Supper abrasion resistant material that is necessary when fishing for permit, tarpon, snook, redfish or other toothy and rough mouth fish. 

Shop Secret:  use the 30 lb test when fishing for pike, musky and other freshwater toothy critters.  Simply tie in 12"-18" of shock tippet to the end of your leader using an albright knot for a stealthy and abrasion resistant rig.