If saving weight is your highest priority, be careful when choosing a guyline cord. 100% Dyneema guylines don’t hold knots well and slip through line tensioners. Other thin guylines have poor breaking strength, especially when they get wet or contain knots. The ZPacks Z-Line Cord solves these issues with strength provided by a Dyneema core and knot-holding power provided by its braided polyester sheath. It also works well with micro lineloc and cam tensioners. This is our pick for guyline material when you are trying to save as much weight as possible.