Guyline weight adds up across a shelter. ThruLine 1 mm is roughly one quarter the weight of our 1.8 mm Reflective Cord. Its UHMWPE and high-tenacity polyester co-braid balances strength, low mass, and handling.

Internal tests measured over 60 lb knotted breaking strength and 90 lb straight-line. Knotted strength is the more useful field number because guyline is usually terminated with a knot, and that knot is often the limiting point. Use knots and hardware that grip 1 mm cord. See Why 1 mm? for the full design story. Not for climbing, suspension, rescue, or life-safety use.

Length: 50 ft / 15.24 m Weight: 7.70 g / 0.27 oz per 50 ft Diameter: 1 mm  Material: Co-braided UHMWPE and high-tenacity polyester Knotted breaking strength: Over 60 lb Straight-line breaking strength: 90 lb Use: Tent and tarp guylines; light-duty camp rigging