The 10.4 Biathlon Sport Rope by Sterling is the Bi-color version of the Marathon Sport. According to studies done by Sterling, marking the center of your rope with a felt tipped marker or other commercial ink can decrease up to 50% of the rope strength - or the energy absorption capacity of your rope. Designed for cragging, alpine routes and even big walls, the Biathlon Sport Rope is one of the more versatile ropes in Sterling's line-up. With two distinct patterns on each half of the rope, it is easy to find the middle, especially helpful when having to rappel quickly. Constructed to be lighter, and incredibly durable with its beefy braiding technology and easy handling, the Biathlon Sport Rope should be a part of any serious climber's arsenal of gear. The 10.4 BiAthlon Sport Dry Rope also is made with their proprietary DryCore technology, that will help maintain the original strength and elongation of your rope in wet or icy conditions. All of Sterling's ropes are treated with DryCore but dry treated ropes then go through a process to treat the sheath and in turn also treats the core again. According to Kurt Smith, Sterling's rep, "This is a pain staking process - we double dip the rope and do the treatment twice to really get it to bond to the nylon.."
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