Tech Cord is an extremely strong cord and extremely abrasion resistant. The polyester sheath surrounds a parallel fiber core of 100% Technora??, resulting in a cord that gets extremely high tensile strength (3,000 pound tensile for 3mm; 5,000 pound tensile for 5mm). Tech Cord is perfect for anchors and slinging chocks and hexes. And can be used as an emergency rap line. The reported tensile strength of Tech Cord, as with any rope, can be significantly reduced when used with a knot.