Petzl Secur Shoulder Straps for Positioning and Croll

The Petzl Secur shoulder straps hold a chest ascender such as the Croll upright on your harness, so it runs smoothly as you ascend rope. They are a simple way to add a chest-mounted ascender to a compatible seat harness.

Why shoulder straps matter for ascent

In a frog or rope-walking ascent, a chest ascender keeps the rope close to your body and grabs as you stand up in a foot loop. For it to work well, it needs to stay upright and tight. Shoulder straps hold it in place so the rope runs through cleanly instead of the ascender flopping forward.

The Secur straps are designed for Petzl's Croll and compatible harnesses. Check that your saddle has the attachment points the straps need before ordering. Browse more saddle parts and shoulder harnesses.

A good chest setup also makes rope ascent less tiring because more of each stroke goes into upward progress instead of pulling slack through a loose ascender. That matters on tall trees where you ascend a long way before working.

Fit and inspection

Adjust the straps so the ascender sits snug on your chest without pulling your saddle up. Shoulder straps are a positioning accessory: they keep the ascender in place, but your life-support connection remains your saddle and rated devices.

Inspect webbing, stitching and buckles before each climb and replace if worn or cut. Life-support gear must meet the applicable standard, be used per ANSI Z133 and the manufacturer's instructions, and be inspected before every climb by a trained user.

Practice the full ascent setup on the ground first.