Sterling created the Ice Thong 7.7mm Twin Ropes to give you every possible advantage on long, steep pitches of ice. These dry-treated twin ropes wont gain water weight while they sit in the snow at the belay, so you dont finish a pitch with five pounds more than you started with. Youll appreciate the Ice Thongs low 40g/m weight on a long approach. Using two of these Sterling ropes adds redundancy to your system and allows you to make full-length rappels off the multi-pitch monster you just sent. Sold individually.