Two hikers wearing Vastnaut exoskeletons on a mountain trail

The 4x4 full-leg exoskeleton.
Your all-in-one choice.

4 joints. 4 motors. Full-leg power for the toughest terrain.
Flexible to switch to a Dual-motor setup for easier adventure.
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All you expect.
All in Vastnaut One. And more.

Vastnaut One is built for demanding outdoor scenarios, from rugged terrain and heavy loads to long-distance journeys. Whether you want to go further, enjoy the outdoors with less fatigue.

Full-leg power

Hip motors up to
1000 W

Knee motors up to
800 W

Reduced physical exertion up to
42%

Full-leg power

Hip motors up to
1000 W
Knee motors up to
800 W
Reduced physical exertion up to
42%

Pro-level
knee support

Reduce knee impact up to
35%

Reduce knee-muscle load by
51.3%
(TÜV Rheinland Certified)

Pro-level knee support

Reduce knee impact by 35%
Reduce knee-muscle load by 51.3%
(TÜV Rheinland Certified)

4x4 Flex™
Architecture

4x4
↔
Dual-motor

10 s
Quick switch

4x4 Flex™ ArchitectureOne system Two configuration

10s Quick switch
4x4 ↔ Dual-motor

VastSynergy™ AI
The industry's first end-to-end AI

0 lag

100%
sync with you

VastSynergy™ AIThe industry's first end-to-end AI

0 lag
100% sync with you

Ultra-light and
rugged

86%
carbon fiber

Ultra-light and
rugged

86% carbon fiber

Portable & packable

Portable &
packable

High-capacity
battery

20 km
per battery

High-capacity
battery

20 km per battery

Ready for heavy
backpacks

35L+
backpack compatible

4x4 Flex™ Architecture Full-leg and more.
One system, two configurations.

With proprietary 4x4 Flex™ design, Vastnaut One can switch from Full-Leg 4x4 to a lightweight Dual-motor setup for easier trails. From toughest terrain to leisurely trail, make the most of every adventure

10s

Quick switch

4x4 ↔ Dual-motor

Convertible design

4-joint × 4-motor

Hip and knee move as one. Design around the lower-body kinetic chain.

Flexible to switch

Quick-release design. Switch from 4x4 to Dual-motor setup in 10 seconds.

More freedom in every move

Spherical joints and sliding structures support multi-directional leg movement across changing gaits, postures.

Ultra-light yet rugged

Combines 86% carbon fiber with the strength and durability needed for demanding outdoor adventures.

Intelligent full-leg power

Now. Full-Leg Power.
Every stride amplified like never before.

Intelligent full-leg powerNow. Full-leg power.
Every stride amplified like never before.

95%+

Up to
Power transfer efficiency

42%

Up to
Reduced physical exertion

1,000 W

Hip motors up to

800 W

Knee motors up to

up to42%

Less physical exertion

High-performance 4-motor

Four motors drive the hips and knees. Enjoy up to 1,000 W at the hip and 800 W at the knee for powerful full-leg assistance.

ATD™ intelligent power distribution

Coordinates hip and knee motion in real time, delivering torque where it is needed. Customize each joint's output to match your needs.
Frame 2147226537.png

95%+ high-efficiency power transfer

High-efficiency power transfer structure minimizes loss, so more motor power reaches your body.

Pro-level knee supportMore than adaptive.
The new standard in knee support.

up to35%

Reduced knee impact

by51.3%

Reduced knee-muscle load

Predictive support. Right at impact.

Full-leg sensing with 40+ real-time signals to understand movement across the full-leg kinetic chain. It anticipates each foot strike and delivers active knee support precisely at impact.

Tri-Frame system. Stable support.

Three strategically positioned support points stabilize the knee from multiple directions, keeping assistance securely in place when you need it most.
Vastnaut AI Engine
Vastnaut AI Engine

VastSynergy™ AI EngineSeamless even in complex terrain

VastSynergy™ is the industry's first End-to-End AI algorithm, powered by a million-neuron network and trained for complex outdoor environments.

Real-time response,
0 lag

Trained for complex terrain

Trained for
complex terrain

12 Million

Motion Clips

1000+ Hours

Real-terrain motion data

Ready for the real outdoor

High-capacity battery

High-capacity battery

99Wh battery. Up to 20 km.
Ready for heavy backpacks

Ready for heavy backpacks

Compatible with 35L+ backpacks.

Ergonomic fit

Adjustable waist and leg fit for different body types.
Comfort materials

Comfort materials

Soft, breathable, and flexible.
Portable and packable

Portable & packable

Folds into your pack. Airline-friendly.
Durable and water-resistant

Durable & water-resistant

Rugged construction. IP54-rated.

App and watch control

Control at a glance.

Hear From Users

Active with knee concerns

Michael

“Downhills used to be the part I dreaded most. With Vastnaut One supporting my knees, I feel much more confident on steep descents. I can focus on the trail again instead of constantly worrying about my knees.”

Outdoor photographers with heavy gear

Harrison

"Once you're doing 10-20 km with a heavy camera pack, that's where it really makes a difference."

Lifelong adventurer

John

“The first time I hiked with Vastnaut One, I caught a glimpse of my younger self again. That feeling was incredible.”

Outdoor couple

Alice & David

“We love that one exoskeleton works differently for both of us. He prefers the full 4x4 for extra knee support, while I like the lighter dual-motor setup. We each get the support we want, without compromising.”

Vastnaut One mobile

The world's first

AI-powered 4x4 exoskeleton

Built for the toughest terrain.

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