For a long time, True Blue has been the climbing line of choice for many climbers. Made from 100% polyester, True Blue premium climbing line has low stretch and high strength. It stays firm, round, and flexible with use and requires no milking. ), and abrasion resistant. Its bright blue color makes it highly visible in the tree. Samson True Blue is one of the most pliable and flexible ropes we sell, and is also quite strong. True Blue is a heavier climbing line, so if you are looking for a strong line that is a bit lighter, try Samson Arbor Master.