An untensioned tent is enough to keep you awake all night, so make sure all the guylines are locked down tight with MSR's CamRing Cord Tensioners. Non-slip ring design locks securely and can be paired with MSR ultralight cording. Ultralight and adjusts easily, CamRing cord tensioners eliminate the hassle of tying and retying knots. Available in two sizes: the small cam rings fit 1.5 - 3 mm cord and come four in a pack, the large cam rings fit 3 - 5mm cord and come two in a pack.