Petzl Zillon Positioning Lanyard: The Complete Guide for Working Arborists

What is the Petzl Zillon?

Quick answer: The Petzl Zillon is an adjustable work-positioning lanyard built for the climbing arborist. Its mechanical adjuster lets you lengthen or shorten the lanyard with one hand, even when it's fully weighted. It's certified to EN 358, made in France, and comes in 2.5 m, 4 m, and 5.5 m lengths. We carry the 4 m and 5.5 m Zillon.

Now the longer answer: for those of us who have tried to adjust a traditional rope grab with one hand or tend a sap-ridden friction-hitch lanyard with one hand, you know the struggles. The Zillion is the solution. I have used a Zillon work positioning lanyard, and this post covers what it is, how it works, which length to buy, what it does well, what bugs me, and how to keep it in service. 

Petzl Zillon specs at a glance

All three lengths share the same adjuster, materials, and certification. The only real difference is how much rope you're hauling around.

• Certification: CE EN 358 (work positioning)

• Materials: stainless steel, aluminum, plastic, polyester rope

• Made in: France

• Guarantee: 3 years

• Repairable: Yes, with the Petzl Zillon Replacement Lanyard (4 m and 5.5 m)

How the Zillon adjuster works

The Zillon is a mechanical adjuster used in place of a friction hitch. If you climb on a Petzl ZigZag, it will feel familiar, because the Zillon's device is a pared-down cousin of that same mechanical prusik design. (New to the ZigZag? Start with our two-part ZigZag breakdown.)

Three parts do the work:

1. Progressive lock and release. Depressing the release lever pays rope through gradually instead of all at once. Let go, and it holds. That makes it a smooth feed, not an elevator with no brakes.

2. Sealed ball-bearing pulley. When you take up slack, the rope runs over a pulley rather than dragging through a hitch. Tightening up feels like a zipper, not a tug-of-war.

3. Steel friction elements. The parts that see the most wear are steel, not aluminum, so the device lasts longer than you'd expect from something this light.

The lanyard rope itself is bright yellow. That isn't fashion. It means you can tell your lanyard from your climbing line at a glance, from above or from the ground. 

Zillion double mode vs. single mode

Petzl designed the Zillon to be used in two ways. Choose by what the job needs, not by what looks cool on Instagram.

Not sure which rings your harness has? Check the attachment points on your arborist saddle before you set up either mode.

The hand rule in single mode isn't a suggestion. Petzl's instructions call for a hand on the free end. In SRS mode, that hand is part of the system, so it stays on until you're back in MRS mode or tied in another way.

Petzl also publishes a separate warning about clipping into the free end of the Zillon. In short, don't improvise connections to the tail. 

Which Zillon length should you buy: 2.5 m, 4 m or 5.5 m?

There is no true “this length is best”; instead, you yourself will know based on the trees you normally encounter. 

Our pick for most climbers: the 4 m. It’s long enough for most removals and short enough to stay manageable. Step up to the 5.5 m if your days are mostly big-wood spar work. Both sizes are in stock as the Petzl Zillon adjustable lanyard.

Field notes: what I like and what bugs me

I climb on a Zillon, so here's the honest version. You can trust a gear review more when it admits a flaw or two.

What I like

• One-handed adjustment under load. Simple release with one hand when under full load. 

• Taking up slack is effortless. The ball-bearing pulley makes snugging into the system feels like nothing. That adds up over multiple cuts. 

• No hitch to babysit. No re-dressing, no glazing, no hitch that worked yesterday and decided today it would take the day off!

• It's repairable. When the rope wears out, you swap the rope instead of retiring the whole unit.

The small bugs

• Longer version equals more rope to manage. The extra rope has to go somewhere. Left loose, it finds every stub or epicormic growth in the tree. 

• Learning curve. If you've run a hitch for ten years, the feel takes a day or two to trust. Practice low and slow before you take it to the top of a 90-foot oak.

Verdict: The gripes are real but minor. For anyone who spends real time on spurs or finds themselves in awkward positions, the Zillon earns its spot on the harness.

Setup, safety and inspection

It's a positioning lanyard, not a fall-arrest system. It's built to hold you in a working position, not to catch a fall. Keep your anchor above you, keep slack out of the system, and keep a second point of attachment when you cut.

Carabiners matter. The connector between the Zillon and your harness affects how it loads and how it sits. Petzl has a dedicated tech tip on choosing the carabiner for the Zillon. Follow it, not whatever is loose in the truck.

Watch for twist. If the device's connection twists, it can load the hardware in ways it wasn't designed for. A Petzl Micro Swivel keeps the unit in correct orientation even in the funkiest positions.

Inspect before every climb. It takes thirty seconds:

• Rope: no cuts, glazing, flat spots, core shots, or chainsaw kisses

• Sewn terminations: stitching intact, no fraying

• Adjuster: locks and releases smoothly, no cracks, burrs, or heavy wear on the steel friction parts

• Pulley: spins freely

• Carabiners: gates close and lock every time

For periodic documented inspections, use Petzl's Zillon PPE inspection procedure. If the rope is the only problem, the Zillon replacement rope gets you back in service. If the adjuster is damaged, retire the lanyard. That's not a time to be frugal.

Petzl Zillon FAQ

What is the Petzl Zillon used for? The Petzl Zillon is a work-positioning lanyard for arborists. It holds you in place against a stem or limb, so both hands are free to work. You adjust its length with one hand, even under load.

What lengths does the Zillon come in? Petzl makes the Zillon in three lengths: 2.5 m (8.2 ft), 4 m (13.1 ft) and 5.5 m (18 ft). They weigh 570 g, 735 g, and 900 g. Bartlett stocks the 4 m and 5.5 m versions.

Is the Petzl Zillon a fall-arrest lanyard? No. The Zillon is certified to EN 358 for work positioning and restraint. It isn't designed to arrest a fall, so keep slack out of the system and your primary suspension point above you.

Can you replace the rope on a Zillon? Yes. The Petzl Zillon Replacement Lanyard swaps out a worn rope, so you don’t have to retire the whole unit. Retire it if the adjuster itself is damaged.

What's the difference between SRS mode and MRS mode on the Zillon? In MRS mode, both ends connect to your harness ventral attachment point. In SRS mode, it also connects to the ventral attachment point, and one hand stays on the free end when descending.

Zillon vs. a rope lanyard with a friction hitch: which is better? The Zillon adjusts more smoothly under load and especially when pitch is involved. 

How long is the Zillon warranty? Petzl covers the Zillon with a 3-year guarantee against manufacturing defects.

The bottom line

The Petzl Zillon makes positioning faster, smoother, and one-handed. That means less fighting your gear and more time making cuts. It costs more than a hitch lanyard and asks you to manage some extra rope. 

If you’re ready to retire the friction-hitch dance, the Petzl Zillon is ready to tango.