According to the sales pitch its as follows:
Red Ice also has proved very successful when fishing either from shore on shingle or on rocky beaches, as its high abrasion resistance copes very well with rough ground.
Load of rubbish if you ask me.
never had any problems with red ice at all,30lb straight through over really heavy ground, also used it on the boat. But when i'm buying line (red ice was a gift) Gerry's bobby basic mono (german i think) does the job, used to be 3 spools for a tenner, bit more expensive now.
why use expensive line over heavy ground? gerry's best 30 / 40 lb mono straight through ideal for short lobs into kelp & rocks.