Teufelberger's treeMOTION, and the standard it isn't rated for
Read the label on a tree climbing saddle and one certification is missing. That absence isn't an oversight — it's the clearest statement anyone makes about how arborist work actually differs from working at height.
The treeMOTION Pro X is certified to EN 813:2024 and EN 358:2018, plus ANSI Z133-2017, ASTM F887-23, CSA Z259.1-05 and AS/NZS 1891.1:2020.
Look at that list again for what isn’t in it. EN 361 — full body fall arrest — is absent.
That’s not a shortcut, a cost saving, or a gap in the product. Nearly every professional tree climbing saddle on the market is the same. But it’s the single most useful thing to understand about arborist equipment, and it explains almost every design decision in the harness.
What those numbers actually mean
The three European harness standards are not tiers of the same thing (JSP publishes a clear side-by-side). They describe different jobs.
EN 361 is fall arrest. A full body harness, tested statically to 15 kN held for three minutes, and dynamically with a 4 meter drop using a 100 kg mass. It exists to survive an uncontrolled fall and to put the resulting forces through your body in a survivable way.
EN 358 is work positioning and restraint. It holds you in place at a work position so a fall doesn’t happen. On its own, it is not rated to arrest a fall.
EN 813 is the sit harness — suspension work, rope access, hanging comfortably and working. Its dynamic test uses a 1 meter drop, a quarter of the EN 361 distance. Also not rated for fall arrest by itself.
A tree saddle carries the second and third. It does not carry the first.
Why the discipline is built that way
In the three disciplines we wrote about earlier, fall protection is the case where the rope hangs slack until something goes wrong. Tree climbing isn’t that case, ever.
A climber ascending or working a canopy is on a tensioned line the entire time. The system isn’t waiting to catch a fall — it’s already holding the climber’s weight, continuously, and the climber is moving within it. There’s no slack to fall into, which is exactly why the harness is optimized for suspension rather than shock.
There’s a second reason, and it’s specific to trees. In industrial work at height, the anchor is a structure engineered to be an anchor. In a tree, the anchor is a living limb of uncertain condition that moves under load, and the climber selects it themselves, from the ground, by judgment. The discipline responds by never letting the system go slack in the first place — because the way you manage an unpredictable anchor is by loading it smoothly and continuously, not by shock loading it.
That’s why arboriculture is governed by ANSI Z133 in the US rather than by the fall protection standards, and why the saddle is designed the way it is.
What the design does with that freedom
Once you’re designing for continuous suspension instead of fall arrest, different things matter.
The bridge. The Pro X runs a double bridge — one longer, one shorter. The bridge is the movable attachment span across the front of the saddle, and it’s where the climbing system connects. Two bridges of different lengths means the climber can change their working geometry without rerigging: attachment position, how upright they sit, how far they can reach out to a limb.
Four attachment points, with chest and suspender compatibility, because a climber in a canopy works in three dimensions and needs to hang from more than one relationship to the rope.
Cobra quick-release buckles in waist and legs, double side adjustable — a saddle you put on and take off repeatedly through a day, over changing layers.
A 150 kg / 330 lb maximum user weight, which is the number to check against your own weight plus saw, plus kit, plus whatever you’re carrying up.
The part that says the most about the company
The Pro X ships with 10 replaceable parts — bridges, back padding, leg padding, elastic cords — specifically so the harness can be rebuilt as it wears rather than retired whole.
Set that against the 10 year maximum lifetime from date of manufacture that the textile carries regardless. Those two facts together describe a design philosophy: the calendar sets a hard outer limit you cannot argue with, and within that limit the company would rather you replace a bridge than a saddle.
That’s the same lifespan logic we covered with carabiner wear, running the other direction. Metal has no expiry and dies by wear. Textile has an expiry and dies by date. A harness is mostly textile, so the date wins — but the parts that wear fastest are the ones Teufelberger made replaceable.
For a company that has been making rope since 1790 and is still family-owned eight generations later, building the thing to be repaired is roughly on brand.
What to actually take from this
If you climb trees, none of this is news, and the saddle is the one most professionals converge on for good reason.
If you come from rope access or rescue and you’re looking at arborist kit — which plenty of people do, because it’s comfortable and well made — the useful takeaway is this: a tree saddle is not a fall arrest harness, and no amount of quality changes that. If a task puts you in a position where you could fall into a system rather than hang in one, you need EN 361, and the saddle isn’t it.
Knowing which standard your harness answers to is the same skill as knowing whether your descender is rated for one person or two. The label is the answer. It’s just that most people read the brand name and stop.
Full write-up on the manufacturer is on the Teufelberger brand page. We use and recommend Teufelberger; nobody paid for this, and when they become a stockist we’ll say so on the page.