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Calamine and Sumac are my favorite ropes....hands down....just had to say that for the millionth time....@Zacchaeus, how did you like the Fly? I have 120' in one of my block and tackle sets. I needed a small dia. rope and I like how round it stays. Then I bought another 50' to go with a DMN throwing hook. Light weight and the color combo is nice. Never climbed on it and doubt I ever will. I prefer the thicker ropes. Learned on 1/2'' 3 and 16 strand ropes. I got Yale's Sumac and Calamine to play with now. I love the Sumac and I'm sure the Calamine preforms the same.