An incredible new PMI rope, ExtremePro(TM) with Unicore(R) technology is the ultimate polyester kernmantle rope. Unicore(R) technology creates the ultimate bond between sheath and core. Nearly zero shealth slippage. Sheath is 100% polyester, Core is 100% Nylon 6,6. Available in 11mm diameter. Two colors. Available lengths include 61m, 92m, and 183m. Custom orders accepted for any length longer than 183m.