Petzl Zyper

The Petzl Zyper is designed as a dynamic cow's tail for use on via ferrata. The brake is a piece of forged aluminum with one round and one elongated "teardrop" shaped hole. The 13-mm cord has a loop sewn at each end and covered with plastic to protect the stitching. The distance between the two loops is about 170 cm.

The newer Zypers come with a sewn webbing loop for attaching to the seat maillon. Mine is an older model that does not have this feature; however, I can use a sewn spectra sling to accomplsh the same goal.