I absolutely adore Zpack's 1.3mm zline for tarp ridgelines or stakeouts. Ultralight, zero stretch, super visible, holds tight with micro line locs, compatible with dutch hooks, & hold's knots extremely tight due to textured sheathing & zero stretch. In 5 years of using it, including high wind situations, I've never had a break or a fray or even ever needed to replace a single line. What more could I ask for?
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