At 8. 8mm, the Argon Double Dry Climbing Rope is undoubtedly Blue Water's skinniest single line our there, and since it's certified as a twin and half, it has more versatility in the vertical world than most ropes out there. It looks at home high up in the alpine or on a desert tower as it does on a ridiculously challenging sport or traditional single-pitch route. This Argon features Blue Water's top-of-the-line Double Dry treatment, which coats both core and sheath to practically eliminate water absorption and drastically increase abrasion-resistance.