Protalus T-100 Landing Gear
You were here before.
Something brought you back.
Trust that.
Your body has been trying to tell you something. Maybe it's the feet that ache by end of day. Maybe it's the knees, the back, the heaviness in your legs that arrives earlier than it should. Whatever it is — give your body 90 days to respond. If it doesn't, we refund you completely. No questions. No return shipping. Your body makes the decision.
Let Your Body Decide — Order Here
Skeletal alignment comparison — Imbalanced vs Balanced
T-100 Landing Gear · Start here
Protalus T-100 Landing Gear
18¢ a day · lasts up to a year
Free ground shipping · fits any shoe with a removable insole
Your body decides. Not us.
90 days · full refund if your body doesn't respond · no return shipping required.
We're not asking you to believe us. We're asking you to let your body find out. 90 days. Full refund if it doesn't respond. No questions asked.
Before you leave again
Five things you owe
to your own body.
Not to us. Not to the product. To yourself.
Pain is not the problem. It's the notification that a problem exists.
Your body has been sending you an invoice. The heel pain. The knee ache. The back that tightens by midday. The legs that feel dead by end of shift. None of that is the problem — it's the bill your body sends when it's been operating outside its design parameters for too long. Restore the geometry flat ground removed, and 9 in 10 bodies cancel the invoice on their own. Not because we intervened in the pain — because we gave the system back what it was built to run on.
Your foot was never built for the ground you walk on.
Two million years of evolution shaped it for variable terrain — rock, soil, grass, roots. Every surface that yields and tilts and shifts. Modern concrete gives it the same flat zero every single step, forever. Your foot is still waiting for the terrain it was built for. The T-100 is the closest thing to it inside a modern shoe.
Your foot is a four-act story. Insoles only know one frame.
Every step your body takes moves through four distinct mechanical phases — heel strike, loading, midstance, toe-off. Each one hands off to the next. Every insole you've ever worn was designed for the foot at rest. The T-100 is engineered for the foot in motion — all four phases, every step.
Your body deserves to land safely, travel the right path, and take off fully.
The T-100 is built to the published 42°/16° subtalar joint axis — the documented geometry of correct human gait. It intercepts the heel at the right angle before weight is accepted. It guides the foot through its designed rotational path. It releases the foot to push off with full elastic energy return. That is what every step was supposed to feel like.
Read the science ↗The evidence is there. You don't have to take our word for it.
An independent laboratory. 39 subjects. 20 cameras. 3D motion capture. The former director of the Nike Sport Research Laboratory. The data is documented, peer-reviewed, and publicly available. And it fits wherever you already are — any shoe with a removable insole, up to 2E width. No prescription. No new shoes.
$64.95 · 90-day full refund if your body doesn't respond · free shipping
Something you may not know yet
Your body has
a second heart.
Flat ground switched it off.
The calf muscle pump is your body's second circulatory engine.
Calf muscle pump — your body's second circulatory engine
Every correctly executed step squeezes the deep veins of the lower leg — pushing blood back up against gravity toward your heart. It doesn't run on electricity. It runs on geometry.
When the subtalar joint cycles correctly through its 42°/16° rotational path, the calf fires at the right moment, the pump activates, and blood returns efficiently with every step. When flat ground locks the subtalar joint out of its natural range — the pump loses its trigger. Blood pools. Legs swell. Fatigue arrives earlier than it should.
The Mechanism
The calf muscle pump — your second heart
Every correct gait cycle contracts the calf, compressing the deep veins and returning venous blood toward the heart. More powerful than venous valves alone — and entirely dependent on correct ankle geometry.
The Dependency
Venous return runs on geometry
The subtalar joint's rotational range directly determines how effectively the calf pump fires. Correct 42°/16° cycling ensures the calf stretches and contracts fully — maximising the pump with every step.
The Problem
Flat ground — the trigger never fires
Flat ground locks the subtalar joint out of its natural rotational range. The calf never completes its full contraction cycle. Blood pools. Legs swell. Fatigue compounds — silently, every day.
The Restoration
Landing Gear — the pump reactivates
Restore the 42°/16° geometry and the subtalar joint cycles correctly again. The calf fires as designed. Venous return improves. End-of-day fatigue drops — because the second heart is beating again.
Without correct geometry · every step
With geometry restored · every step
Independent lab · 39 subjects · 2019
In the lab,
the body decided.
39 people walked into an independent laboratory. They didn't choose an outcome. They just walked. 9 in 10 of their bodies converged on the same destination — functional alignment — regardless of where they started, how much damage had accumulated, or how far they had drifted from correct geometry.
Study
BioMechanica LLC · Portland, OR · November 2019
Method
20-camera NaturalPoint Optitrack 3D motion capture · 100fps
Subjects
39subjects · 4 conditions incl. market-leading comparator
Result
9 in 10within functional alignment · all differences p << 0.005
Reset to correct biomechanical operating parameters. The body made the decision. Not the person.
The body knows what correct feels like. When the geometry is restored, it responds. Not because it was told to. Because it was designed to.
No other OTC product has demonstrated this through 3D motion capture.
"The proof is not in how it feels — it is in what the motion capture measured."
— Dr. Martyn R. Shorten, Ph.D., Former Director, Nike Sport Research Laboratory · BioMechanica LLCLet your body be the judge.
Your body has been waiting
for this geometry.
$64.95 · 90 days · full refund if it doesn't respond · 98% keep it · free shipping
Fits any shoe with a removable insole · up to 2E width · no prescription required
Order HereThe problem · The mechanism · The lab data · The evidence chain →